A member asked:

My period is 4 days late after taking plan b 3 days before period was due. i know i'm not pregnant and i'm always regular. i have cramps. whys it late?

A doctor has provided 1 answer

Late period: After taking Plan B so close to your expected period, you have used synthetic hormones that have affected your natural cycle. It is not unusual to have an abnormal period or periods after Plan B. It will likely return to normal very soon.

Answered 8/5/2014

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