The lowcarb and exercise has helped my pcos more than I can convey. My cycle is "normal" for the first time in my life. (Im 38 now, diagnosed when I was 19) I still have the dark skin patches, but I can live with that, I still have hair on my chin, but it has quit growing in (I just have whats there, nothing new) and best of all, the hair ontop of my head isnt falling out. My hair is so thick now, its actually hard to manage!!
Keep at it, you have nothing to loose besides symptoms and weight. If it doesnt work, then try the meds.
Good Luck to you