i was supposed to start my period on June 11th and i still havent started yet. Me and my boyfriend do have unprotected sex quite often and he pulls out. There have been about 5-10 times he has came in me but I lost tract when he did. I've taken 3 preg tests and they come out negative. I took one last week and the other two each week before that. I have been having cramps for the past month on and off and i think im about to start my period but nothing.. Anyone know what could be wrong or an opinion about the fact?