I have been taking Yaz for the last 2 months and 1 week. The first and second month I had mild nausea. In the third month I am having a lot more problems, and I don't know if it's the Yaz or something really weird happening to me. My hands and arms will twitch uncontrollably, I feel very groggy, hazy, can't concentrate, and slightly dizzy. I still have the nausea, but that's the least of it. Also, I seem to be in a very bad mood, possibly because I feel like crap, but it seems like my mood is even worse than my actual symptoms if that makes sense.