and had some strange side effects. I got really dizzy, I actually felt like I was on a boat. Like the earth was shifting beneath me. I read on some Yaz support group message boards at the time that it can affect the inner ear....something about the fluid retention in the ear. In any case, I have never had it before or since. I also developed anxiety, but I think it was because the dizziness was freaking me out. I was only on it a week and it took about a month for me to feel normal again. I have taken every fertility drug under the sun since and never had side effects that affected me as adversely as I did with the Yaz. I do have a history of Migraine headaches, so that may have made me more sensitive.