Scared and asked me to take the plan b pill because he had a hunch that something went wrong so i did. i got what seemed like a period 3 weeks later. ?

See your doctor now: Four questions on the same issue. It is critical to see your gynecologist right away to evaluate what is going on. Plan b is high dose oral contraceptive which causes a spontaneous abortion. You need further evaluation as soon as possible.

Plan B: Potential side effects w emergency contraception includes menstrual flow changes (spotting, bleeding, early or late period). Don't know when you had sexual intercourse. If was quite early in cycle, was the bleeding when you anticipated your period? if you are uncertain if the bleeding was your period then would take a home pregnancy test.