The first time I had sex it was unprotected and in a pool. My boyfriend doesn't think he came inside me. It was April 5 and I got my period April 9, but my period was really light and short compared to what it normally was. Not only that but I've had to pee a lot more than usual and my stomach has been hurting a little bit and I've been really tired. I'm still in highschool and I don't want to quit track unless I have to and I don't know how to tell my mom. Please, give me an idea of what I should do.