Sorry you are enduring this awful disease. I certainly didn't feel lucky but now I've seen how much worse it can be for some others on here. I've had it only 6 months in my left hand & wrist but does feel like it is trying to "spread" up my arm except the loss of function is still just in my hand & wrist.
The only thing I can think that may help prevent the spreading is 500 mg. Vitamin C every day and the nerve blocks about every 2 weeks. I have had 12 of those so far.
Sure hope it gets better and not worse!