I have been on Yaz birth control for 1 week now and my hubby and I have had unprotected sex lots of time starting from the last day of my period up until the first day I started Birth control ( I started bcp on 11-4-07. Haven't done it all the first week i was on it but again yesterday. Could i get pregnant from doing it before i was on birth control and did i wait long enough to do it yesterday? Also.... how will i know the differance between bcp side affects and pregnancy. I don't want the pill to hurt the baby.