unprotected sex last Oct. 1 2010, that was Friday afternoon. Three days after, and that would be Oct. 4, 2010 I had a stomach ache or abdominal pain. Until now (Oct. 11, 2010), my abdominal pain keeps on returning. :( am i pregnant... its been a week and 3 days after i had sex with my boyfriend, can't wait for my menstruation, my last menstruation was Sept. 17, 2010.. PLEASE HELP! What should i do?