I guess you could say I had unprotected sex with by boyfriend, he went in me twice just for a little while and pulled out, and the next morning I got my period, at first the blood was a brown color then it turned to red and was a heavy flow, but it only lasted 4 days,and now it has been 6 days since intercourse and I have headaches, and feel nauseas, and hungry at times, could I be pregnant?

