Hey Jackie,
Haha yeah my screen handle probably seems weird to folks who aren't familiar with neurological issues :) My GI system is pretty sensitive and I don't tolerate most drugs well (opiates give me a tummy ache and so do most painkillers, antibiotics REALLY mess me up) but I do fine with Valium. I felt maybe a light stomach cramp with the very first pill but not much after that. I worried a lot about whether it would constipate me and it never did.
Carpel tunnel syndrome and peripheral neuropathy can be very similar, both involve nerve inflammation, it's the extent and scope that differentiates the two symptomatically. In most cases, if the weird sensations are in one hand (I think the docs call them paresthesias), it's likely carpel tunnel, if it's more systemic (as in affects both sides of the body or the arms plus the feet) then it's probably something else...
As for whether the docs would be reluctant to prescribe Valium, that part I'm not sure about. Some might be. Here, I've seen several CRS for my fissure, and only one had Valium as part of her treatment plan. The others said they don't use it for fissures. I was very skeptical and now really feel it works though. The problem I can see is that some docs may see it only as an anti-anxiety drug and not consider it for spasm of involuntary muscles. But you can see here that at least some places have suggested it be used for anal sphincter spasms (search for "valium" about halfway down):
http://emedicine.medscape.com/article/776150-treatmentValium usually isn't a primary drug of abuse, meaning people don't normally abuse it and get addicted to it the way they do to cocaine or heroin. It's usually secondary -- since it's a sedative, people who use cocaine or heroin or methamphetamines use it to "come down", so they can go to sleep, for example. So I think that's what most docs will watch out for... If they suspect some history of stimulant abuse, they might be reluctant, otherwise I can't see any big concerns (personal opinion only of course). Right now I take 5 mg a day on good, easy days, and up to 30 mg a day on bad ones, which is pretty low as far as Valium goes.
BTW I have had an anxiety disorder since my teenage years (used to be severe but only mild-moderate now) and the Valium does make me feel more relaxed, which is a nice side effect. It is not intended for long term use, so I can't use it for treating my anxiety disorder, but as far as drug side effects go, I can't say this one is too bad.
Good luck!