I was 46 when my symptoms started, although in hindsight I was having problems with my voice being very soft, and some mild cognitive problems in the year or 2 before things got too bad. Like you, I have random symptoms that don't fit a normal diagnosis of PD. I stopped going to the doctor back in 2009, apart from seeing him for things not related to my neurological problems. I sort of accept I had M.E, as many of the symptoms I have are seen in M.E and it is more than just chronic fatigue. Added to that, my symptoms worsen of very minimal activity.
Last year I was on a NHS forum for people with a diagnosis of CFS/ME and mentioned that I keep freezing when trying to move. The doctor on the forum said this isn't a normal M.E symptom and I should see my GP. my GP has been very dismissive of me, so I could bring myself to go through the process of being made to feel I was wasting his time, I was pretty sure he wouldn't take much notice anyway, and to be honest I was wearied of seeing neurologists and being made to feel as if I'm sub-human. Anyway, I had a problem with a trapped nerve in my arm and had to see my doctor. He wasn't available so I saw another doctor in the practice. She thought I should see a neurologist.
The local neurologist didn't think I had PD, but decided I should be referred to Prof Bhatia, so that's how I got sent back to the National.
I have no doubt my age and gender have helped me get to at least some attention. Unfortunately it's still common for neurologists and doctors to write women off as having psychogenic problems, because it's supposed to be more common in women. They have an in built prejudice. I hope your new neurologist treats you better.