Hi Angela,
Welcome to SoulCysters!

I'm glad you found us! This is a really wonderful site, with a lot of very supportive, knowledgeable ladies who are facing many of the same issues as you are.
I agree with what Chris and Brenda have said; a good diet approach is to always couple carbs with protein. The other thing I personally try to do is to eat organic/natural foods -- e.g., fruits and veggies grown without pesticides, and meat/dairy who are not given hormones. I'm not perfect about it - probably achieve this about 80% of the time - but I think it helps. While I think managing carb intake is absolutely key, I've also read that some doctors/researchers theorize that PCOS is caused/influenced by exposure to toxins. So the more we can do to minimize the toxins in our diet, the better! I think it's espcially critical to avoid meat and dairy products that contain hormones. Our bodies are out-of-whack enough in that department; we certainly don't need the additional stimulation there.
You may have noticed this already, but there is an alternative remedies board with a lot of information on other herbs and supplements that are helpful to some PCOS women. So you may find some options there which are different from what you tried previously. The difficult thing I think we all face is that there is no magic cure-all, and what works for one lady, may not work for another. I do think, however, being attentive to diet is important for every one of us!
Hope this information is somewhat useful to you. Definitely keep us posted on your learnings and your progress! Look forward to chatting with you more.
Best wishes

Lissa