I had sex yesterday and I mysteriously bled. I've had sex plenty before in all sorts of positions with various degrees of roughness, but this has never happened before, not even my first time. I don't think it was rough enough to merit the bleeding and the guy was good-sized, but not excessively huge. I bled for maybe 2 hours on and off after it was over. I am just wondering if this has happened to any other girls and if anybody knows what may have happened to me.