“Normal” isn't one number — it's a range
From the start of one period to the start of the next is about 28 days on average, but anything from 21 to 35 days is normal. If your cycle is usually 30 days, day 29 isn't late at all. And your own cycles shift by a few days from month to month too.
What helps
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1
If you've had sex without contraception, take a test. From the first day you're late, the answer is reliable — and if your cycle is irregular, at least 21 days after the last time you had sex without contraception. Don't wait for next month — whatever you decide, it's better to know sooner.
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2
Count from your own average. Not from 28. That's what the app does, and it gets more accurate with every entry.
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3
One month isn't a pattern. A cycle that shifts usually corrects itself the following month.
When it's no longer just “late”
If your period is late and you have pain — especially one-sided, or with dizziness, fainting, shoulder-tip pain or spotting — get urgent help now, don't wait for morning.
And it's no longer just “late” if:
- three periods in a row that haven't come, with a negative pregnancy test
- gaps shorter than 21 or longer than 35 days that keep repeating
- irregularity along with weight change, severe tiredness, new coarse hair on your face and body, or changes in your skin
- unexpected bleeding between periods
And if your periods stopped after weight loss, eating too little or hard training, don't wait three cycles.
Sources
Health information, not medical advice, diagnosis or treatment. For your own symptoms, talk to a doctor.
Your cycle, honestly.
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