Okay my period ended on 10-21-12 and i had unprotected sex the same day .. and i am wondering if i could be pregnant because my stomach has been hurting more and more everyday .. i have had unprotected sex before and never felt like this .. i want to know if there is a possibilityif i could be pregnant i took a test 4 days after the unprotected sex and it came out negative .. do you think if i take another test next week it could come out positive