Has anyone experienced bleeding after sex?

As of 6days ago my boyfriend and I had sex and I started bleeding after, mind you I was in a lot of pain during the act. Now 6 days later I'm still bleeding and still experiencing pain, a few nights ago I couldn't handle it anymore and went to the ER. They couldn't tell me anything... I'm very worried Bc in the past two months I've been to the ER several times for lower pain... I've been told it's maybe my ovaries, they are twisting, they also mentioned ovarian cancer... But this time they couldn't find anything! I'm not due for my period for another 9days... Any one have this problem? I'm actually a little scared of what's going on...