I was also diagnosed with PCOS, about 6 years ago. My doctor put me on Yasmine at first, then I went off it because I don't like the side effects that being on the pill gives me (I've tried 4 different pills!). We finally settled on doing a 6-7 day cycle of Provera to prevent more cysts once or twice a year (I tried Metformin and it didn't do anything for me). The first treatment worked for a while, but kicked off about 6 mos. later, and my dr. moved to a different state (she was a specialist in the field at the University of Iowa hospitals). A year after that I had my annual exam and my new OB prescribed me a 10-day cycle of Provera. This one did the trick, and I was regular for about a year and a half, w/no cysts, and got pregnant about 5 mos. ago. That treatment worked for me, I know everyone is different, but I've been where you are and hated every minute. I'm not saying Provera is a miracle drug, but it did work for me. Also, when I WAS on Yasmine, it worked better than any other pill I've been on.
Just my two cents. I really hope that whatever you and your doctor decide helps! PCOS sucks, doesn't it? :)