understand 'neuropathy' let alone all it means?
Thing that makes it more confusing is that EACH one of us has gotten 'it' in different ways.
Re-read this from the 'stickies' carefully... and slowly so as to asorb it.
http://www.aafp.org/afp/980215ap/poncelet.html
It discusses some of the different causes, and also emphasises how varied and different onset, and effects can be. Even tho this is a ten-year old paper, it's clear enuf for us mere patients/sufferers to understand.

This one is a bit more technical, but can cover the gamut as well...
http://emedicine.medscape.com/article/1171051-overview

Then, it's up to you to sift thru the different 'stickies' and decide which one fits you best? This site is extensive but gives a thumbnail sketch of the hundreds of different types.
http://neuromuscular.wustl.edu/alfindex.htm
Basically there are four types of neuropathies: Inherited, acquired [immune triggered- heart attacks, diabetic] , toxic [poisons, alchohol], and traumatic [spinal or other bodily injuries that affect/effect the nervous system]. Many combine #'s 2&3 into one of acquired with subsets...

As for SFN balance and weakness issues? Have you been less active than before? As in a LOT less? I ask as my own initial of SFN was the result of a 2-day hospital stay after which I could barely walk! Being in that bed for 2+ days let me vegetate totally and things went from there to worse after several months home.

If it were me, and based on my own first [now EX] neuro's assesment, I would go get a second opinion ASAP. That means honestly at least 2 months wait? But if you are available for a cancellation at the drop of a hat? It could be well worth it. Also if your GP could put in a good word as well? That helps heaps in getting you seen asap.

Nerve damage at first, isn't what the long term damages could be. A nerve conduction study done within the first 4-8 weeks from a sudden or any onset will likely change after about 6 months, IF it is going to be deteriorating at all. A good neuro should monitor at varied intervals for changes in the conduction studies....

I can't say whether your SFN diagnosis is right or wrong. I can only say, that based on my own experiences the numbness progressed...agressively up my limbs and the first [now-EX] neuro did not do additional testing -some of it quite simple to eliminate other possibilities. Obtaining other neuro opinions clearly indicated that some 'other possibilities' were happening and while treatments are limited? The best treatments I can obtain are being obtained. Each doctor has their own opinions and they are usually based on their past training..if what you present [to them] is within those training parameters they aren't gonna be what I call 'curious' and look any further. Neuros who've seen more of the odder neuropathies will test.

Honestly tho? Treatments are limited for neuropathies - the 'menu' of meds tried for most are posted in the 'stickies' somewhere... It is a VERY GOOD list. Each of us is different and once thoroughly tested to eliminate the worst of PN issues, we just have to go with what we have. Wish it were different but not much has changed in the 6 years since I got this stuff, I am very sad to say. Well, at least I can still type! Tho not as fast as in the past! Sigh? 's and hope! - j