A member asked:

I took plan b pill last month and bled for 2 days, 5 days after i took it then got my period the next wk. this month im already 2 wks late for my prd?

A doctor has provided 1 answer

It happens sometimes: Taking Plan B or other emergency contraception pills can alter the timing or the quality of the current menstrual cycle and the upcoming cycle. One should check a urine pregnancy 3 weeks after taking Plan B, because Plan B works most of the time but not all of the time.

Answered 11/28/2015

1.9k views

Thank

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