I'm only 15, going to be 16 in 5 days. I started having my period when i was 12. I had sex with my boyfriend like a day or so after my period ended 3 weeks ago. He only went in and out for a few minutes. I haven't had any symptoms of pregnancy. No tender breasts or anything. I know I'm still young, does that mean I'm just being irregular? Please help. And no saying "Oh you're too young for sex." None of that. kthnkx