Hello Lou Ellen @louellenc, Welcome to Connect. It sounds like you've had all of the normal tests, including a skin punch biopsy but they weren't able to find a diagnosis. I'm sure you are not alone and others with similar symptoms have struggled to get a diagnosis and treatment. You might find this related discussion helpful:
-- May have undiagnosed autoimmune disease:
https://connect.mayoclinic.org/discussion/may-have-undiagnosed-auto-immune-disease/
You mentioned your neurologist couldn't find anything and thinks it's anxiety. Have you thought about getting a second opinion from a specialist like a neuromuscular neurologist?