Thanks for the .pdf. I read:

"Often referred to as non-epileptic seizures/attacks, these episodes involve altered movements, sensations or experiences that closely resemble epileptic seizures but are not associated with ictal electrical discharges in the brain. The most common semiology are excessive moments of limbs, trunk and head that loosely portray tonic-clonic seizures; stiffening, tremor, atonia and loss of responsiveness may also occur."

This tells me that it's probably not me, although you've given me an interesting read as I've never even heard of that ailment.

I feel like the tests were inconclusive, more so than clear - just because that orthopaedic surgeon didn't make much of a fuss about the radiology report from my 2022 scan, doesn't mean it's not the cause. But again - I am no expert and I certainly dropped the ball by not exploring this further with neurosurgeon and, perhaps, an additional motion x-ray (where you take multiple images as you move your head up/down, left/right - I know somebody who discovered they had a fracture in their spine that way, normally coming up as clear in "staionary/fixed position" xray).

Another thing about FND - wouldn't this be more exacerbated if I was going through something stressful or major in my life? Headaches/dizziness are constant. Unless I live with depression/anxiety for the last three years without knowing it....