Your symptoms definitely sound like mine, and mine is due to a pinched sciatic nerve (1974-75 - carrying bricks to pave a patio).
It flares up every few years, even almost ruined a Wales/Scotland vacation when I bent over to tie my shoe, on the 2nd day of a 3 week vacation (1987).
Slept on hotel floors for the next 2 weeks.
Walked really crooked & 'bent' until it subsided.
(Lotsa pain all the time, when it flares)