i was with my boyfriend and i started bleeding during sex on occasions, i would get a sicky feeling in my stomach. And the first time this happened it lasted for around 9 days. I have had sex with 2 different men since and it has happened with all of them but the last time i had sex i also experienced a burning sensation down below. The burning would get so bad that i could hardly go to the toilet. The bleeding and burning only lasted for a day or 2. I cant think of anything to explain what is happening??