Alright, so i'm 15. I'm young, I know. Me and my boyfriend recently had sex, with a condom but nothing else, about 3 weeks ago...I was supposed to get my period today and didn't, which i could just be late but im taking a pregnancy test tomorrow to make sure. When we first had sex it hurt for a split second but went away and i didn't even bleed. The times afterwards however hurt quite a bit more to the point where i actually shrieked in pain. It goes away after a few seconds but when he first puts it in it still hurts alot. I've also recently had lower left side pains that i used to have quite a bit but it went away, since i became sexually active they're back. I went to the doctor for it where they mentioned some nonsense about the GI tract and stuff and after a ct-scan and several ultrasounds they ended up just giving me a prescription and it soon went away. I know i just said a whole bunch but i'd really appreciate if someone could tell me if what im feeling is normal or if we're maybe doing something wrong? Please help, i'm really worried and i need some reassurance :-(