Hi,
I had nerve study and surgery only to find that the pain came from ruptured disks in my upper back. Often the injections do help and was used first on me.
I would get a second opinon as you are not totally comfortable with the plan of action. The nerve study is somewhat painful and expensive.
Try several wrist braces and keep the receipt. It took me a while to find some I could work in and also sleep in.
Blessings,
Sharon