Sounds as if we are in the same boat.Even though I have late onset I was diagnosed in my 40's.
My cerebellar syndrome started about 6 years ago.Many think my degeneration has been rapid bbut it is only this year I have developed the tremor and cannnot walk unaided. I can do certain things but very slowly and with difficulty.It seems such a contrast with how I used to be.
However I have no pain,fatigue or swallowing difficulties.I have only just gone into a wheelchair and have spent many happy years with the walker.