I am 18 and have been having sex for about 2 years now and my hymen broke the first time i had sex. i just recently had sex (i also had it 3 weeks ago so i have sex regularly) and heard a pop and noticed blood coming out of me and on my partners penis. we

Prob. Hymen popping: Although you have had sex before, it is possible that you had maintained a relatively intact hymen, which is possible. This time looks like your hymen got ruptured which is expected and a normal thing under the circumstances. If you or your partner have additional symptoms, check with your respective doctors. And please use condoms if not wanting to get pregnant:)

Micro-Tears common: I'm sorry to hear about your experiences with bleeding during sex. Small amounts of bleeding noticed after sex may be caused by small vaginal tears also called "micro-tears". If concerned, see your PCP for examination.