It was the first day off my period. basically got raped and it was 2 minutes with no condom. He came before he inserted it in me. I took plan b for the first time Sunday about 16 hours after it happened. About 3 days later I started bleeding dark red/ brown blood. I don't know if it was my "period" or not since I just got off a couple days ago. I've been reading post that it could be implantation bleeding but i hope it's not. It's nearly a week later and I've been feeling  nauseous but I haven't thrown up. I've been stressing myself out because I don't know what's going on and I've been reading different post everyday. Hopefully this is just plan b side effects and I'm not pregnant.