I have had sex with my bf,2weeks after my monthly period end..we do a withdrawal to prevent me getting preggy,but to make sure right after we had sex,i took a DIANE PILLs and drink it until 1pad finish.I was supposed to have my monthly period by Sept.7,but to my surprised my monthly period didn't come until now 16 Sept... do i get pregnant even if i took the pills?I am worried as I never had an irregular monthly period..I need ur advice.thanks