Hi Heather,
Obviously you want to hear this from a doc to be sure, but I can tell you that Metformin/Glucophage did wonders for me. I was very fortunate to have a sympathetic gyn who believed me when I told her I thought I had PCOS. The medicine straightened out my cycles (so much so, in fact, that I was pregnant within two months of starting the meds) and helped me jump-start my weight loss. I started taking it in January 2002 and at the same time, started walking during my lunch break and eating better. Over the next 6-8 weeks, I dropped ten pounds, and then found out I was pregnant.

I got off the meds as soon as I found out I was expecting, and I never had to go back on them. Nearly four years later, my cycles are regular again, the excess weight is gone, and my blood sugar tests well within the normal range.
That's just my .02 - I know meds can affect everyone differently, and I'm certainly not qualified to give medical advice. I just wanted to let you know there is hope, so hang in there.