The short explanation
After an emergency pill, your next period may come on time, a few days early, or up to a week late. The pill shifts the timing of ovulation, which can change your cycle that month. But if it has been three weeks since you took it and your period has not come, it is time to do a pregnancy test. A home urine test is reliable three weeks after unprotected sex. If it is negative and your period still does not come within another week, repeat the test or see a doctor. If it is positive, see a doctor soon to discuss your options.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- Stress, travel or illness can also delay periods, but pregnancy should be ruled out first.
- If you had unprotected sex again after taking the emergency pill, that sex was not covered.
- Starting a regular method of contraception gives better protection than repeated emergency pills.
- Severe one-sided pain with a late period needs urgent care, as it can signal a pregnancy outside the womb.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- This answer cannot tell whether you are pregnant. A pregnancy test can.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- Should I do a pregnancy test now?
- Why might my period be late after the emergency pill?
- What options do I have if the test is positive?
- Which regular contraception would suit me?
When to seek help
Clinician-approved guidance for this topic. When in doubt, being seen is never the wrong choice.
Emergency — call 112 now
- Call 112 or go to the nearest emergency department if you have sudden severe one-sided belly pain, fainting or shoulder-tip pain.
Book an appointment soon
- Do a pregnancy test now, and see a doctor within a few days if it is positive.
Raise it at a routine appointment
- Book a routine appointment to start regular contraception.
Sources
The evidence this explanation is built on.
- Emergency contraception NHS
- Contraception NHS
Who wrote and reviewed this
Every AskHer answer names its author. A clinically reviewed answer also names the clinician who signed it off — if no clinician is named below, it has not been clinically reviewed.
- Author
- AskHer Editorial (AI-assisted draft) AskHer's editorial team — not an individual clinician Works in English, தமிழ், हिन्दी
- Clinical reviewer
- Nobody yet No clinician has signed this answer off, and no person on the editorial team has read it yet. That is what the “Written with AI assistance” label means. It is queued for an editor to read, and then for a clinician who works in this area. The sources it was drafted against are listed above.
- Review status
- Written with AI assistance — not yet reviewed by a person
- Last reviewed
- Not yet reviewed by a person
- Version
- 1
Correction history
Substantive changes are listed, not quietly edited away.
No corrections have been made since this answer was first published.
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