A great place to go and really learn about PCOS is
www.soulcysters.com - not only is it FULL of resources, but there is also a message board like this where you can ask questions and get support.
I'm still going through a mulitude of tests to see if I truly have PCOS. Honestly, I'm not 100% sure about all the tests required, but I've done blood tests and had a pelvic sonogram. My problem may not be PCOS- it may just be insulin resistance, which has a lot of the same symptoms, and is actually a symptom of PCOS...LOL...if that makes any sense.
Check out that site and I hope it answers your questions.