I'm about 1.5 months into being on Yaz. For the year & a half prior, I had a non-hormonal IUD which I only stopped because of the excessive bleeding it caused the entire time I had it. A month and a half into being on Yaz, my breast are so sore and enormously bloated (like when I was pregnant). I've also had very bad stomach pain - not cramping, but burning and muscular pain. I've also be excessively tired. I tend towards not being super-energetic, but now I feel very, very lethargic. After reading all the posts and researching Yaz's side effects, I may stop after the end of this pack. The one thing I did absolutely love was the ~ 3-4 day, very light period. But, that benefit isn't worth the side effects. :(