Hi! i am a 16 y/o girl and i have been getting my period for about three years. i had unprotected sex about a week ago and today my period showed up two weeks early. i took plan b the morning after we had sex.

Typical with Plan B: Plan b essentially disrupts the normal menstrual cycle by blocking or delaying ovulation. That it is how it works and why it is so different than a medical abortion. Irregular bleeding after taking Plan B is not rare. Always check a pregnancy test after using Plan B and see a doctor for birth control. You may not know if it's Plan B bleeding or your cycle because the cycle was disrupted.