Diagnosis of PD is not a fine art. Medicine is getting there, and there are scans for those who have deficiency of dopamine stemming from the Substantia Nigra. But here could be deficiency from other places, and there are conditions that look like PD, parkinsonisms, and several others. If you do not have the classic signs diagnosis could take years. Closure ain't what many of us get.

If you are doing ok and your symptoms are not troubling you get on with your life, do the things you want to do. And more if you can, exercise and live.

Waiting for a PD diagnosis could be like a small death if you don't. Oh and go easy on the meds. Less is more. Really.