My friend has pcos and had a miscarrage, i heard its a 50 50 chance with pcos that we will have the right levels of hormones to sustain a preg, if u have pcos, as soon as you get preg, you should have ALL your hormones tested so they can monitor which ones you may need to hold onto the bean. Sorry for your loss I cant imagine its easy - but def speak with your dr about managing hormone levels! !
The best thing to do is just talk to your doctor. I think many women have had this problem and there can be many things to help. Lots of women are given progesterone...that's the most common thing I've heard.
Have you looked into the benefits of taking extra Vitamin B?