Is there tests for PCOS?

I was diagnosed over 10 years ago based on symptoms when I attempted to get off birth control. My doctor didn’t really explain it well. And honestly I had to go back on the pill because my acne got bad. So I didn’t much pay attention to it.

12 years later...My husband and I are TTC now and can’t seem to get pregnant. We have an appointment with a fertility specialist in two weeks.

Is there a blood test or other test that can be done to 100% determine if you have PCOS?