I posted the following update a couple of days ago, and I'm happy to repost for you:

I visited a neurologist who tested me in office and said that I showed no neurological problems, no pathology. He said that that this could be Functional Neurological Disorder.
https://www.mayoclinic.org/diseases-conditions/conversion-disorder/symptoms-causes/syc-20355197. He described this as being somewhere between a neurological and psychiatric issue.
This sounds pretty correct to me. I don't rule out long covid as a cause, but that seems less exact. My symptoms began prior to my one recently diagnosed case of covid. However, I may have had covid in early 2020 when my house mate could have had it. There were no tests then, but a subsequent test on him for a past case of covid was positive.
I am almost clear of these symptoms now and but occasionally experience body waves when I wake from dreaming. Therapy made a huge difference, as well as time I suppose.
Don't despair. We don't know the future.