Last Saturday I had sex with a guy and didn't use a condom. It was only my second time having sex and he had a little trouble getting it in and did it with force. On Monday I went and got plan B and used it. Now a week later I found that I was bleeding irregularly, because I shouldn't have my period for another 2 weeks. So I can't tell if it's just happening from the intercourse or if it is implantation bleeding, because I took the pill.