Hi,am 18 years old. I had sex with my boyfriend yesterday. I felt a horrible pain when my partner penetrated into me. but once completely penetrated gave me a wonderful feeling. we had sex for some time and after 10 minutes tried for an another time. during both the penetrations,after my partner pulled out i noticed a 1/4th of a cup of blood coming out of me. even after sex i was bleeding for sometime and it literally stopped after a day. Is this normal bleeding so much during sex? Or i wanna know am i having any disease?