I usually get my period early. it's not regular and i usually get it every 2 weeks. one night my boyfriend and I were messing around and he put his penis inside my vagina. we got worried and i've been paranoid ever since. He didn't cum while he was inside me but we are still scared. now it's been 3 weeks since my last period. I'm not sure how i can get a pregnancy test because we are very young to have a child. We have told his aunt and she said not to worry too much. But now that i'm later than usual on my period i'm worrying. any help?