They don't have an exact diagnosis in the sense of a name to my disease, but now I know it is an auto-immune deficiency that causes my body to get confused and attack nerve endings, likely as a result of getting vaccinations last year. Putting an exact name to it isn't going to change the treatment options in any meaningful way.

Believe me, I too have many sleepless nights worrying about the progression of my condition.

The sleepless nights and constant worrying don't help me at all, and I doubt they are helping you either. By getting the tests and seeing qualified professionals you are doing the right thing. Worrying about it now isn't going to change a thing and it could hurt by slowing down your bodies ability to heal.