A member asked:

Does plan b one step mess up your period? if so, how bad? will i be late? i am supposed to start in four days roughly..

A doctor has provided 1 answer

Pregnancy unlikely: Plan B (or other emergency contraceptive pills) can alter the menstrual bleeding for the cycle in which Plan B was taken, and sometimes the next cycle too. One should be sure to check a home pregnancy test about 3 weeks after sex, because Plan B works most of the time, but not all the time.

Answered 11/29/2017

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