I know first hand what it feels like to be a medical mystery. I used to feel lik a pin cushoion with all of the blood tests I had. One time I had 21 vials drawn and 117 tests performed. Still nothing to work with.
So - I can empathize with you.
There are so many things that can cause what you are describing. You have been to neurologists and psych docs and cant get answers. For me it was an astute doc that noticed something - albeit minor that I pursued. Thank the Lord I was blessed with a great neurologist at Mayo that did a lot of tesiing to come to a diagnosis.

I might suggest doing a daily journal from the time you wake to the time you go to bed. This was very useful for me to show my docs. This migh seem like something inconsequential but could help shed a little more light on what is going on. You might find something that makes things worse or triggers another feeling. All of that can be important pieces of the puzzle.

Don’t give up. I understand it feels like there will be no answers.
Prayer can be a great place to find solace and peace. For me - that time is one of the only times I can focus on something other than myself.

Peace
Larry