@tngirl103
I agree with @bmfoster
Medicine is so specialized these days and your husband would I think benefit from seeing a movement disorder specialist.

A general practioner or general neurologist *might* be helpful if, after discussion, they referred your husband on to a specialist.

If there is a Parkinson's organzation in your area, either you or your husband might be avail yourselves of the support groups there. He is the patient, you are the caretaker. That could be in person or online in a zoom meeting or such; the organization does not have to be in your immediate area.

I find it very useful and supportive to compare notes and experiences with others, as does my wife, in our respective support groups. These forums help too.
All the best!