I'm a 17 year old girl and I've been dating a guy for 2 years now. Both of us lost our virginity to each other and have not had sexual contact with other people. Im on the birth control pill, Yaz, and my boyfriend and I always use condoms, until recently. Lately, I've been bleeding a little when we're having intercourse (with out condoms) and I was wondering what could be wrong? I know that it's not my period, seeing as though I know when I start.