When my boyfriend and I have sex or foreplay sometimes, we tend to get rough. When we get too rough, I start to bleed. We usually mess around in the dark, so when we turn on the light, we see a lot of dried up blood that we didn't know was there. This doesn't happen all the time. It only happens when we get really rough once in a while. However, I am concerned if this is going to have a long term affect on me. I have also been dating and been faithful to the same guy for 7 years.