Hi, I'm Ressa. About 3weeks ago I had intercourse with my guy friend. I'm not on birth control, but I did not have sex for about 8 months before. He pre cum in his boxers and tryed to put it in me. I was very cautious so I kept pusing him out. When we did have full sex I made sure we had a condom on & he made sure it did not pop. It's was very "ruff sex".it was right after my period had just ended. About a week later I started to feel gassy and a bubbly feeling in my stomach.I did not throw up, but just felt that way all day. I notice I would have bowel movment more and I passed gas and belched more. After a while that went away not I feel a sharp pain in my pelvic / waste area. And a little bubbly feeling. I took a test 15 days after intercourse and it came out negative. My next period is due on Feb 18 2013 . sharp pain in my BreSt but when I touch on them they are not sore. And pain in my back.