I'm 16 and My boyfriend and I had sex for the first time about a week ago. He put his penis in me unprotected just for a second and then he wore a condom. He wasn't in me long and pulled out before cMing. My period was supposed to be this past Friday and now it's Sunday. We had sex again yesterday and he wore and condom and pulled out once again. I'm having a weird stomach pain. Not like cramps or soreness but almost like an upset stomach. I've been working out a lot more recently too. Help I'm freaking out and I can't be pregnant.