I have been on Yaz for over a year now and it's been less than pleasant. First the mood swings which I attributed in the beginning to lots of stress (I started taking Yaz about a month before my wedding). The mood swings continued. My anger has been uncontrollable at times and I get upset for nothing. I have always been a reasonable person but Yaz has taken all that from me. After giving it more than enough time for my body to adjust to this pill I have finally decided to get off Yaz next week and talk to my doctor about an alternative option. Apart from mood swing I've experienced severe fatigue no matter how many hours of sleep I get. I can't stop eating, have severe problems with heartburn and constipation. My sex drive is pretty much gone and I am negative about pretty much everything. I really hope that I will get back to my old self once I get off this pill. To everyone out there with similar experiences, I feel for you.