"honestly, i am not on birth control yet, i&#039;m 23, 101lbs and i have had graves disease in my early childhood. i had sex with my boyfriend on april 17th and took the plan b pill 4 hours after. day one of taking the pill i felt very tired. day two i felt slightly nauseous but did not vomit. day three i still felt the same as day two. for the rest of that week i felt just tired, bloated and nauseous. there was little blood when i used the bathroom. all i can say is i felt some things that made me feel confused about what was happening in my body. finally on april 24th i got my period! it was a little blood at first then the next day the blood flow was very heavy. so basically i got my period twice in one month. but i&#039;m not pregnant!"