Hi,
I know I'm a newby to the board, but I am not to PCOS.
I've been dealing with it for years; far longer than the 7 I've been diagnosed.
First off; you may appear 'normal' on blood tests, but that doesn't mean your blood sugar and insulin levels are right. The averages they base these tests on are taken from an Insuin Resistant culture.
I'd been hyglycemic all my life, with all the symtoms but 'normal' blood test results.
One test that would give you a good idea of how your body handles sugar is a Glucose tolerence Test (GTT); they take a regular fasting glucose then feed you a pure sugar concoction and take your blood again after a 2 hour wait. Showing 'Normal' on fasting glucose, this was the only test that reflected trouble.

A difinitive diagnosis can only be given by an Endocrinologist; Hormone Dr.
Ask your Dr. for a referal.