Is it PMS or pregnancy?

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PMS and early pregnancy share the same hormonal machinery (progesterone does both), so sore breasts, bloating, fatigue, moodiness, and mild cramps genuinely cannot be told apart by feel alone. The differences are in degree and timing. PMS symptoms track the cycle: they build in the week before your period and resolve within a day or two of bleeding starting. Pregnancy symptoms do not resolve: breast tenderness that persists and deepens, nausea (morning sickness usually starts weeks 4 to 6), a missed period itself, and sometimes implantation spotting, light pink or brown spotting around the time the period is due, shorter and lighter than a real period. Other early-pregnancy hints from womenshealth.gov: needing to pee more often, food aversions or smell sensitivity, and unusual tiredness. The settling move is a home pregnancy test, and timing is the trick: testing on the first day of a missed period is reliable for most people, and testing earlier invites false negatives because hCG has not climbed yet; if negative but the period still does not come, retest in a week. If your cycles are irregular, count 3-plus weeks from the sex in question. Two cautions: PMS can change character over the years, so "this feels different" is weak evidence either way; and severe one-sided pelvic pain with a positive test, or pain with dizziness or shoulder-tip pain, is an ectopic-pregnancy emergency, not PMS. If the test is positive, start a prenatal vitamin with folic acid immediately and book the first prenatal visit; if negative and the wait repeats monthly with life-disrupting symptoms, that is a PMDD or PMS treatment conversation worth having.

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