I have been experiencing bleeding after sex for about nine months. I have been tested for nearly everything and , all with negative results, have had labial specialists look at me as well as second, third, and fourth oppinions, and no one seems to know what is going on. The bleeding is not heavy, I wouldn't even constitute it as the lightest possible period blood. It ends up on the toilet paper after urinating immediately after having sex. The tricky issue is that I know it is not coming from inside. It isn't coming from my cervix is what I mean to say, it is coming from the opening of the vagina. On one occasion before seeing the doctor I made sure to have sex before my appointment, approximately an hour before so that whatever had been going on would be active during my visit. However, upon examination the doctor was unable to find anything, not even an irritated area from which the blood could be coming from. It happens when I am well lubricated , and even when excess lube is used. I am on birth control, am in a commited relationship for the last year and a half. The sex does not hurt, however, initial penetration is often uncomfortable and feels like the first time I had sex. This is not my first partner, but this is the first time anything like this has happened. He is large, but this only started happening six months into our relationship when we had already been having sex regularly. Also, no piercings for either one of us.I don't know what to do anymore and it is really affecting my self esteem not to mention our sex life. Any advice and or help would be appreciated.