My boyfriend and I had unprotected sex (stupid I know) August 17th I had gotten off my period the day before. My period came a little early in September and I know for sure it was my period because it's usually heavy and nothing changed. now it's late. I have cramping like I am about to start but I haven't had anything other than that. Where I'm in college and I'm getting homesick and dealing with the loads of homework I'm hoping it's stress related, but is it possible I could be pregnant?