One thing was extremely helpful, though probably not helpful to others on this board, but who knows, maybe you know someone who could use it:
When I was in the car accident, I had a closed head trauma. One of the things that happened (among others unfortunately) was my head hit the passenger door on my right front of my head. What happened is my brain shook to the left of my head, and when it bounced back, nerves were disconnected on the left. So, though I was hit on the right, and I've always heard the opposite side is affected, actually my right side of my body was affected.
One of the effects was the rocks in my ear (sorry, I din't know the medical term for them, they help maintain balance) were shaken to a different area of the ear, not all, just some. This really screwed up my balance, them being where they weren't supposed to be.
My family doctor knew this and referred me to an ear, nose, and throat doctor. He referred me to a place that performed the "Epley Maneuver." I just laid on a bed/board, with my head hanging a little over the end, they moved my head in a certain way, they saw my eyeballs dancing around, so yep, I needed the maneuver.
They held my head in a certain way, turned it a certain way, saw my eyeball movements were less. Then, they had me come back in a week and do it again. What they were doing was moving the displaced rocks to a place where they wouldn't cause any problems (they could not put them back where they came from)
Whoever this Epley person was, he was a genius - problem gone, no surgery!
I don't need them anymore, but now, every few months or so, I need to do it again. Well, that place has closed down, but U Tube has a couple of videos that explain it very well, and I do it when I think it might help.
I used to have 'disembarkment syndrome' meaning sometimes I felt like I just got off of a cruise ship. The Epley helps with that too. I only get it now when I ride in TheHusbandHalf's truck. I get out, stand holding on to the door for a minute, and I'm fine.