I had sex for the first time about three weeks ago. And it hurt so bad I told the guy to stop. Well neither one of us climaxed. And he wore a condom. And my period came right when it should and the first day was regular and the second started off o.K. But then I look up and it was gone. The three day it came back for a little bit and stopped and on the fourth day nothing,and that was it. I was stressed and focused very hard constantly checking to make sure it was still there every time I changed my pads. Thinking about the possibity of being pregnant and so on. And that's all I was thinking about but.