Me and my boyfriend of 2 years, were having sex the other night, and at one point, he missed. It hurt so bad, I started to cry, he got hurt to. That night I had to pee, and it hurt badly, I noticed I had a very small tear/cut right outside my vaginal opening. I know we are both clean, because when we started dating we were both tested for STD'S/STI'S, I am just worried that it is a disease in result of him possibly cheating, and me not knowing, however I highly doubt he ever would even think about that. I am just paranoid, I have talked to him about what has happened. Please let me know if I should go see a doctor, or let it heal. Is it possible to tear during sex?