Hi, I have been on birth control YAz for about 3 years now I have never had a problem. I do seem to notice that when I did get my period it was for only two days and that was normal, however this last month it seems like I had my period in the middle of my pack! Like 2 weeks early but it was very short and I thought maybe it was just spotting. Anyways, now I am on my 4th day of placebo pills and haven t gotten my actual planned period and have no pre period symptoms. Im really confused on whats happening, I have had sex but never unprotected without a condom.