# Perimenopause or something else? Look-alike finder · Peri Signals > Source: https://perisignals.com/articles/is-it-perimenopause-or-something-else-a-look-alike-finder Is it perimenopause? ## Perimenopause or something else? Tick what is going on and the finder points you to the look-alike conditions worth reading about first, with the answers that brought each one up. It does not diagnose anything. By Nora Whitfield, updated 5 November 2026 Tiredness, poor sleep, low mood, brain fog and changing periods belong to perimenopause, and also to pregnancy, thyroid problems, depression, PMDD, iron deficiency anaemia, stress and ADHD. What usually tells them apart is when the symptoms started, what comes with them, and a few simple tests. The finder below matches your answers against the NHS, NICE and ACOG descriptions of each look-alike and lists the pages to read, most matches first. ### The look-alike finder 1\. About you How old are you? Under 40 40 to 44 45 or over Where are your periods now? Still coming, regular or not No period for 12 months or more Stopped or controlled by contraception or a medical reason Not sure Have your periods changed in the last year (timing, flow or length)? Yes No Not sure, or no periods to go by 2\. Your situation Tick every line that is true for you. These carry the most weight in the result. I could be pregnant (sex without reliable contraception in the last few months) My period is late or missed this month Low mood or loss of interest most of the day, nearly every day, for 2 weeks or more My mood sinks in the week or two before a period and lifts within a few days of bleeding Trouble with focus, forgetting or organising that goes back to childhood Heavy periods: soaking a pad or tampon every 1 to 2 hours, large clots, or over 7 days A lot of pressure lately (work, family, money, illness or a loss) On hormonal contraception (pill, hormonal coil, implant or injection) 3\. Your symptoms Tick what you have had over the last few months. Hot flashes or night sweats Sleeping badly, or much more than usual Tiredness and lack of energy Getting out of breath more easily Paler skin than usual A fast or noticeable heartbeat Feeling cold when others are not Constipation Losing weight while eating more Shaky hands or a tremor Weight gain Dry or itchy skin Hair thinning or more hair coming out Forgetfulness or trouble concentrating Low mood Anxiety, worry or irritability Headaches Muscle tension or aches Feeling sick, or a metallic taste Sore or tender breasts 4\. Anything that needs help now Tick any that apply. They go to the top of the result. Thoughts of harming myself or of not wanting to be here A missed period, then unusual bleeding with tummy pain Soaking a pad every hour for over 2 hours, with dizziness, chest pain or breathlessness Any bleeding after 12 months with no period Show me what to read first Your answers are saved anonymously, with no name or contact details, so we can see which look-alikes readers ask about. Your result is worked out on this page either way. ### How the finder matches your answers Each look-alike has a short list of answers that point to it, taken from the source named below. An answer from section 2 counts twice and a symptom counts once. A look-alike only shows up when you tick its key answer (such as a possible pregnancy, two weeks of low mood, or focus problems since childhood) or enough of its symptoms. The list then runs from most matches to fewest. There is no overall score for perimenopause. * **Pregnancy.** The [NHS list of early pregnancy signs](https://www.nhs.uk/pregnancy/trying-for-a-baby/signs-and-symptoms-that-might-mean-youre-pregnant/) includes several that perimenopause can cause too: a missed period, light bleeding, tiredness, sore breasts and mood changes. Feeling sick and a metallic taste belong to pregnancy alone, so they push it up the list. * **Depression.** The NHS advises seeing a GP when [symptoms of depression](https://www.nhs.uk/mental-health/conditions/depression-in-adults/symptoms/) last most of the day, every day, for more than 2 weeks. That one line is enough for the finder to show it. * **PMDD.** Timing decides this one. [ACOG](https://www.acog.org/womens-health/faqs/premenstrual-syndrome) describes premenstrual symptoms that start in the days before a period and ease within about 4 days of bleeding starting, cycle after cycle. * **Thyroid problems.** Feeling cold, constipation, losing weight while eating more and shaky hands point to a thyroid problem, because perimenopause does not usually cause them. Without any of those, the finder needs four shared symptoms (such as tiredness, weight gain, dry skin and thinning hair) before it shows the thyroid page. NICE's [thyroid guideline](https://www.nice.org.uk/guidance/ng145/chapter/Recommendations) reminds doctors that menopause symptoms can mask thyroid disease. * **Anaemia from low iron.** The [NHS page on low iron](https://www.nhs.uk/conditions/iron-deficiency-anaemia/) calls heavy periods a very common cause and lists tiredness, shortness of breath, palpitations, pale skin and headaches. Ticking heavy periods is enough to show it. So is feeling tired along with either getting out of breath or looking pale. * **Stress.** The [NHS stress page](https://www.nhs.uk/mental-health/feelings-symptoms-behaviours/feelings-and-symptoms/stress/) names headaches, muscle tension, a faster heartbeat, poor concentration, forgetfulness, irritability and sleeping too much or too little. Several of those are perimenopause symptoms too, so stress appears only if you said you have been under a lot of pressure. * **ADHD.** Symptoms of [ADHD in adults](https://www.nhs.uk/conditions/adhd-adults/) usually start before the age of 12\. Problems that began in your 40s point elsewhere, so the finder only shows ADHD when you say yours go back to childhood. Three more pages can appear. If you use hormonal contraception, you get our page on how it can mask perimenopause. If you are under 40, you get the page on early menopause. Ticking forgetfulness adds the brain fog page, which explains the blood tests for B12, folate and iron. ### When to get help today Section 4 covers situations that need help straight away, before any reading. Thoughts of harming yourself mean calling 999 or going to A&E if you are in danger now, or calling NHS 111, Samaritans on 116 123, or 988 in the US. A missed period followed by unusual bleeding and tummy pain can be an ectopic pregnancy, which the NHS treats as urgent. ACOG's [bleeding guidance](https://www.acog.org/womens-health/faqs/perimenopausal-bleeding-and-bleeding-after-menopause) sends anyone soaking a pad every hour for more than 2 hours, with dizziness, chest pain or breathlessness, to emergency care. Bleeding after 12 months with no period is not an emergency, but it always needs a GP appointment, as our page on [bleeding after menopause](/articles/bleeding-after-menopause) explains. ### A worked example Say you are 46 and your periods still come but have changed over the past year. In section 2 you tick heavy periods. In section 3 you tick night sweats, poor sleep, feeling tired and getting out of breath. Anaemia comes up first with four matches, because heavy periods count twice and the other two symptoms once each. Below it, the result says perimenopause still fits, since at 46 your periods have changed and you have night sweats as well. Now add "low mood most of the day for 2 weeks or more". Depression joins the list with three matches (two for the low mood, one for poor sleep) and sits just below anaemia. Both can be true together, so the result keeps them side by side and leaves the choice of what to check first to you and your GP. ### When perimenopause is still the likeliest answer Suppose you are 45 or over, your periods have changed, and you get night sweats or sleep badly. The [NICE menopause guideline](https://www.nice.org.uk/guidance/ng23/chapter/Recommendations) says a doctor can identify perimenopause from that alone, without hormone tests, and the finder tells you so when it sees that combination. If a look-alike shows up as well, it is one more thing to rule out. Perimenopause stays on the table. Our [perimenopause symptom checklist](/articles/could-it-be-perimenopause-a-symptom-checklist-with-what-to-do-next) looks at that side of the question in more detail. ### My take I'd read the top one or two pages the finder gives you and skip the rest for now. Then I'd take the result to a GP and ask two direct questions: would a full blood count and a thyroid test change anything for me, and is a pregnancy test worth doing first? Those three are routine tests, and between them they cover pregnancy, anaemia and the thyroid. If you are over 45 and the GP says no to both questions, a few months of dated notes from our [printable symptom diary](/articles/printable-perimenopause-symptom-diary-and-appointment-checklist) will tell you more than another test. ### Frequently asked questions Can I have perimenopause and one of these conditions at once? Yes, and it is common. The NHS says Hashimoto's disease, a cause of an underactive thyroid, usually starts between 30 and 50, heavy periods in perimenopause can cause anaemia, and depression is more likely during the transition. Finding one does not rule out the other. Which blood tests help rule the look-alikes out? A full blood count looks for anaemia, including the B12 and folate kinds, and a TSH test checks the thyroid. A urine pregnancy test answers the pregnancy question. Over 45, NICE does not use hormone tests to confirm perimenopause itself. Does the finder keep what I tick? The result is built in your browser. When you press the button, the answers also go to us anonymously, with no name or contact details, so we can see which look-alikes readers come here about. ### Related reading Every look-alike we have written about is collected under [is it perimenopause?](/topics/is-it-perimenopause) If palpitations brought you here, [palpitations in perimenopause](/articles/heart-palpitations-perimenopause) covers the heart checks a doctor may suggest. Written by Last checked 2026-11-05 --- [Peri Signals](/) Perimenopause symptoms, explained and tracked Plain answers on perimenopause symptoms for women 35 to 65: what is common, what to tell your doctor, and how to keep a useful symptom record. 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