I am 18 years old and have been sexually active since April 2011, a month before my 17th birthday. I had the same partner for 10 months until I started dating my current boyfriend. Almost every time my boyfriend and I are about to have sex, I start bleeding. It's very light, nothing like a period, and only is present for less than 2 hours, but nonetheless bleeding. My doctor switched my birth controls thinking it was the hormones of the other causing in between cycle bleeding. I am now on Nuvaring, but it doesnt seem to be just in between cycle bleeding because it only occurs as we are having sex. It's freaking me out a lot and am not sure the cause of it, especially because I was sexually active for a year before this started happening. My hymen broke when I first lost my virginity, but there was never any abnormal bleeding until now.