I had my period on 2/13/10 had unprotected sex since on 2/19, 2/20, 2/21 and also onn the 26, 28 and 3/6. My boobs are sore and i kinda of have pain i usually get it when i get my period but this feels a little bit more painful also my nipples have a burning feeling. i havent been, but sometimes get a lil bit of headache. I had cramps before on the right side of my pelvic like i was ovulating. i have menstrual like discomfort not cramps but my period still not here and is now about 3 or 4 days late i know is not that late.. could anywhere help me. could i be pregnant ?or is it just my period?