i'm sexually active with my boyfriend. we have sex every time we hang out. it usually starts out unprotected but half way he will put on a condom. at this point my period is about 3 days late, no biggie to me bc my period is usually a few days to a week late. but also i have been feeling many symptoms for "6 weeks pregnant" in the past week. Headaches, Back pains, nausea, food aversion, mood differences than usual. can some one please tell me more reasons my period could be late