I am a 16 year university sophomore. In the past I have been suffering from series of waist and back pains. I lost my virginity last month, it wasn t really like sex cause when he tried going in that was when the blood came grushing down it was so painful and then it was like I just realized what was going on so I stopped everything, we were about to have sex standing up. When I got back to my dorm I started having a very sharp stingy pain round my waist I couldn t move nor stand up, it went on for a while and later stopped and now the pain is back. Please what is the cause and what should I do, I m getting really scared beacuase I m not even sure that me losing my virginity is the cause of the problem, help me!!!