Hi,
Dr Oaklander at Harvard and one of her colleagues has been doing a lot on SFN and its role in FM, Dyautonomia, GWI.
She has a couole of videos online but it her colleague (cant remember the name) thats shows dymylination of the small fibers that constrict around the blood vessels to push blood along....
I am to wiped out to search for the names and that stuff ATM...searching Oaklander should bring up stuff.
Like others have mentioned they meaning Dr Oaklander is using IVIG with success in SFN.
I hope you get everything sorted out and get some treatment.