It's believed by some researchers that the majority of women would eventually get PCOS if their diet supported it strongly enough, so since you already have some tendencies in that direction, I don't think you have anything to lose by cutting back empty carbs and focusing more on fruit and veg and whole grain.
I would NOT go all the way with the PCOS diet (so don't limit carbs per se, just eat less empty carbs) and I'd stick to the lower protein guidelines for now and then see how you go. I don't want you to lose too much weight and end up stopping ovulation...most people need to include some empty carbs to help keep weight on.