Metformin is known to be given to women who have pcos. I too take 500mg 2X since Jan 2009, but im also on the pill too.
While taking
metformin which I started in September 2008, I have lost 49lbs so far. I would call your doctor to see why your period is late, and maybe see if you can get a blood test done to check for pregnancy. If ur not pregnant, then most likly you need Provera to jump start ur period, and if ur not ovulating then u need Clomid or another type of drug.