I'm 15 years old,a virgin and my period is two weeks late. I know two weeks isn't much to stress about but lately I've been eating a lot, very nauseous, my muscles are extremely sore and my breasts are very tender. At first I didn't think much about it but when I was talking to one of my friends about it, they said I was pregnant. I know it was a joke but after that I became incredibly paranoid. Especially because I just learned in health class that while the chances are incredibly slim, it is possible to reproduce without having sex with someone. I've been really scared. It's probably nothing but I don't know what to do, help!