I've been on birth control for over 1 year now, changed 3 different brands, and have been having irregular periods since. I have been on Ortho Tri-cyclan, Yaz and now on a generic version of yaz. I have been getting my period about 2 weeks into the pills for the month and then again durring the sugar pills. I was told that as long as you take your pills every day at around the same time, irregular periods is not an issue that could cause pregnancy. However, I am now four months into the generic version of Yaz pills and this month I have not gotten my period, the sugar pills start today but I have had no sign's of my period yet. Is the information I received incorrect? Or is it still safe to have unprotected sex as long as you take your pills regulary?