My girlfriend and I had sex about 3 weeks ago when she was on her period. Shes been really moody the past couple of days. (hopefully its her period since its almost 4 weeks since we had sex) anyways, my girlfriend has a runny nose. She also feels like vomiting, her stomach hurts and feels like shes about to get a fever. Are these syptoms of pregnancy? Or is it just b/c of her period? Should I be worried? Thanks.