I've been taking Yaz BC for over a year, never missed a pill. Still, I have always been bothered by random breakthrough bleeding episodes. Last month I started bleeding heavily during the second week of my pack, and decided to take a break, allow my body 4 days to bleed as if those were my "period" days at the end of the pack and then restart the pack where I left off. The bleeding stopped after the 4 days (as was my objective), and my body is behaving as it usually does during the second week after my period any other month. However, my bf and I had unprotected sex 5 days after I restarted the pills - I read one should use backup for 7 days after "missing" 3 pills or more. Is there a chance that I became pregnant?
It is very difficult to determine what your body was doing and what the different hormone levels were. I think that pregnancy is certainly a possibility in your scenario although it should be a fairly small chance. Much smaller than usual.