I have PCOS too so I can COMPLETELY understand! A few years ago when I was diagnosed my doctor had me on 4 different pills to try and balance everything out. One was Phentermine (one half of the drug formerly known as Phen Phen). It messed with my heart so much, making it race and skip beats, that I finally just quit. I also took Metformin for a while but it did absolutely nothing for me. Now I don't take any drugs except for one every 3 months.
If anyone is considering trying Slim Fast, I really encourage you to do so. I haven't found anything else on the market that has worked as well. You just have to remember that it doesn't taste anything like a shake. It is a NEW food in and of itself.