okay im on yaz birth control and im on the last 4 pills you know when im supposed to start my period! well i havent started it yet. and i had sex 4 times with in 4 weeks. and the first time i missed 2 pills and WITH OUT a condom it wasnt really even sex because he went half way in then back out and stopped. and he didnt ejaqulate or pre-ejaq. well... more