Im on YAZ and ive probably been on it for at least 6 months (give or take) I start the pack on sunday and i think it was the 2 week in on wed. and thurs. i missed my pills and started my period. I took two on friday and two more on saturday. I recently had unprotected sex on the 19th (yesterday) and i was just wondering what my chances of becoming pregnant are.. oh and i usually dont take my pill the same time everyday (i know this is bad) just be nice please.