Did you happen to get covid or had a really heavy reaction to a inoculation around that time? That's what triggered mine; but it's actually been getting a lot better and (pure anecdotal) but I think 6 months or so of a b complex vitamin pill in the mornings have helped. Apparently, it can promote nerve repair, there's absolutely no money in studying this effect however so research is scant. I think you have very little to lose by trying it, though.

It's still there, but I routinely go weeks without noticing it now.