I had sex with my boyfriend on the fourth day of my period. Then when I thought it was over a couple of days later, we had sex again. That day was the last "official" day of my period. A little while later I noticed that I was still bleeding. It was brown and looked like how my period is at the end. It has been going on for about two days now. Is that normal or should I go to the doctor? I went about 2 weeks ago and was tested for gonorrehea, trichonomasis, and chalymadia and I didn't have anything. Should I be worried, or does this sometimes happen.