Just my two cents...
I don't have an auto-immune disease (my wife does - another story), but I have fought dizziness/vertigo for several years now. This article explains the difference between dizziness and vertigo as it was explained to me.
I suffered whiplash back in 1980, plagued me with excrutiating ice-pick headaches for 30 years until my most recent PT figured it out - pinched nerve in C1. Headaches are under control, but vertigo started after that (I am of the opinion that any treament done to us with our permission may have unknown concequences, and if so, then we deal with those). I continued with this PT for vertigo - successfully, with essentially the same treatment - neck exercises. I do them every day, takes a couple minutes, and have not had vertigo for a few years. Dizziness became an issue more recently - seems my eyes do not quite point together, and have been worsening. Local opthamologist and optometrist thought nothing of it, but I went to a neuro-opthomologist who thought a lot of it. Now I wear slightly prismed glasses - no more dizziness!
I hope this rambling gives some of you some hope and encouragement. Good luck to you all..

Gregv