I take metformin for my type II diabetes. It is the generic name for glucophage. Basically it just stimulates the production of insulin. RAS takes it too and my MIL. I have never experienced any side-effects from it at all. And luckily, it's not too expensive.
Usually, if they start metformin, they will also put you on a liver protection drug like Advandia or Actose, but if you are not technically diabetic, maybe it's not needed.
Also, my gyn told me that I would have a very difficult time getting pregnant...not ovulating, and then I got pregnant the first month I was married.....so you have to realize they are guessing, using statistics and it might not even affect you.
Good luck.
Barb