Your family doctor could order some bloodwork for you to start the diagnosis process, but if you do have pcos, then I would highly recommend seeing a specialist- an Endocrinologist. But to start, I would either go to your family doctor, or to your gynecologist and talk to them about your symptoms and have some bloodwork done.
There is a ton of information on this forum, so take some time and read through some posts, and see if any other symptoms people describe are what you are experiencing as well. Then write down all your symptoms and questions and talk to the doctor.
Denise