I'm 16 and have only been with one guy. We have been together for just about a year and have had sex many times before. Last month I don't remember getting my period. This month (December) we have had sex about 4 or 5 times the last 2 I started bleeding during intercourse. I also Noticed bleeding when I used the bathroom (#2). I don't bleed after at all just during. I also have no signs of being pregnant, and me and my boyfriend are very safe about sex.