I suggest you test for autoimmune conditions. Simple blood tests, some may have to be sent to specialized labs.

Some autoimmune conditions show up with neurological symptoms first.

"We use the tests we have, not the tests we need." per my Duke Immunologist.

Also test for vitamin levels, tho' I imagine that is done routinely,, but check to be sure.

If you do have issues with your Immune System (as I do) you may have deficiencies even tho' your diet is good and you even take supplements. There may be a problem with absorption or mobilizing your vitamins.

Best wishes, and keep us posted.

Hugs, ElaineD