Had unprotected sex before my ovulation and on that day. Had my period aug. 14 it lasted 3 days normally it last 5 days. All home pregnancy test come up negative. Not on birth control. Boobs are tender, headaches, stomach is hard, I'm tired and more sleepy and that's not normal for me. I don't eat ice cream and I have been craving ice cream and have even eating ice cream a lot lately. Could this mean I'm pregnant..?