Could I be pregnant? I got my period on the 9th of march and finished on the 11th of March. I had sex on the 13th. Now for the past few weeks - I've been feeling sick, tired, hungry, and annoyed or sad at everything. I always feel like I'm going to throw up; but don't. So am I neruotic or pregnant? Someone help me please! I'm only 21. I don't have a boyfriend (the guy I had sex with is only a friend from class) and I'm scared!!