Your right on the money with your questions. I also have bodywide small fibre PN. I started experiencing muscle twitching about 18 months into it. It may have been my fault but. I have this foot massage shiatsu machine that I would stand on,and it has these rolling balls. I was probably overusing it cause one day my foot started twitching,and the twitching just sort of spread.

Massaging my feet could also set off massive autonomic symptoms in me, in the beginning. I also have had gastro issues which have improved too. I always had a cramp or tight feeling in my left calf, from the beginning.

Hope an expert pops in here for some better insight into this matter.