I've been having symptoms like I'm tired all the time, I get frequent headaches, my stomach cramps

I'm really worried....I'm only 14??last week I lost my virginity and I know this is kinda early to know but I've been having symptoms like I'm tired all the time I get frequent headaches my stomach cramps and my back I feel dissy sometimes I feel like I'm going to throw up but I don't I've started peeing more than usual I'm breaking out more which I know I'm a teenage but I normally don't break out the other day I was eating s hamburger and halfway through I couldn't stand it I got really sensitive to smell to anyways when I had sex he didn't use a condom and ive had my period about 4 years Im not exactly sure when my period was but I'm pretty sure I didn't have one this month... oh and the symptoms aren't all the time they go on and off I'm a little scared I'm pregnant but he doesn't think so. Can anyone tell me if you think I might be or if I might just be scared cause it was my first time??