Have they rechecked with MRI or xray to make sure nothing is being pinched, from the previous injuries ? I'm assuming they did some spine MRIs due to the headaches, twitches, etc?

Long ago we did have one RSDer that after awhile went to a chiropractor and he was able to find & release the pitched nerve , I think hers was foot or ankle too.
Might be worth a try, just in case, unfortunately many MDs don’t often consider chiropractic options..

Or possibly acupuncture?