Hey Mark,
You're going through so much and I'm with kevbo, go for it, worth a try.
I did have vestibular therapy, couldn't walk straight and felt dizzy, therapist said I'd be in therapy for a long time but I was a lot better in 3 months, not perfect but a lot better.
I never had one sided dizziness at all, it was my whole head/brain
Going for an EEG tomorrow myself so will PM you tomorrow
Hope you're ok, off to the store so gotta sign off!