Hi Lunar
I have got PCOS as well and have insulin resistance and I have been taking metformin which is supposed to help with the insulin resistance as well as my bad skin and some of the other symptoms, but to be honest I have not seen much improvement in the four months i've been on them. I have decided to start the cambridge diet and I've been to see a CDC today and got my packs so i'm starting tomorrow. I have been thinking a lot about it and i've decided to stop taking the metformin and do cambridge instead as in all the literature I have read about PCOS it says the best thing we can do to improve our condition is lose weight, and my GP has been telling me to do this for a long time!!
This is my own decision though so I am not telling anyone else what to do. You could ask your GP whats best for you if you're still not sure
Good Luck with whatever you decide xx