Could i become pregnant??

Brittany
I got got off my period on 1/31/2014 and last night which would be 2/9/14 me and my boyfriend had unprotected sex. Is there a chance i might have been ovulating? My calender says i ovulate tommorrow but i spotted a lil but on sat and have been having lil cramps. Could i be pregnant if my boyfriend went in me last night? Help me! Please :)