I have been taking yaz for six months now. Just like many of you, I switched from ortho-tri cyclen lo thinking yaz would be better for me. In the past I have had extremely heavy periods. Now they are lighter, but last for eight days at least. I have no sex drive, and before I read the other posts on here, I thought I might have another more serious problem because of the dizziness and the headaches. I called my doctor today to get off of yaz!