Phil...
I latched onto this web site after I, too, developed symptoms extremely similar to yours. I had parvo virus b19 last June and a flu shot this past fall with the onset of small fiber neuropathy all around the same time. Won't get into all the testing... it's been exhaustive... but several consults, including neurologist, suggesting post viral syndrome too. Wondering how you're feeling now? It's been ten months for me and still hoping, with time, I will experience improvement. The neurologist said it could be a couple years... hard to believe.
Heb1212
Cathy