I have PCOS so bleeding is a problem for me. Im 38 and I started having problems after I had my second child when I was 26. I have been getting break through bleeding for a while now. I had everything checked. I was on another pill, Aviane, I liked very much. No changes in mood or sex drive. I felt pretty good. Just breakthrough bleeding so i had to change.. Now, I'm on YAZ and so far I still get the bleeding but im very emotional, moody, avery low sex drive and my breasts and chest hurt. Im also tired and draggy. Im at the end of my second pack and I think its time to call my doctor. These message boards are the first Ive heard of loose bowl movements and now I know why this has been happening to me. I thought it was just my diet. Im definitely not impressed with YAZ. It sounded better then it actually is.