Luckygirl, I noticed near the beginning that you wondered if being under a neurologist would be better.
Mu husband had cerebellar ataxia, which is a bit like motor neurone disease, so he was under a neurologist.
It's a very rare disease, so every time he went to see her, they were doing tests on him. They even sent taxis so he could be watched by students; it made him feel like a specimen rather than a person. It might be different with PD, I don't know.
A problem with going to hospital to sort out the meds is that they could put all symptoms down to the PD.
They did that with my husband, and missed the brain tumour at first.
Not easy, is it, being the medical dictionary, the nurse, the bottom wiper, the diary? You have my sympathy. Not much of a life, really.