I had unprotected sex the day my period ended (no blood) It was only for a few minutes and he pulled out but said he wasn't close to ejaculation. But after so much paranoia and research I found out about pre-cum. I took Plan B one step about 2 days later (48-50 hours) After 7 days after taking it I noticed brown-blood like on my underwear. But gradually turned into regular blood and heavy bleeding at that. It only lasted 2-3 days. I am still very worried about this bleeding. Is it my period? Does it mean I'm not pregnant? Please give as much detail.