Hi Herbie,
How did your GP appointment go? I had surgery in my left hand about 3 months ago now, it came suddenly due to inflammation caused by arthritis, but 99% of the time my hand was completely dead, but painful etc. I had surgery under local anesthetic, I had the tourniquet on for exactly 7 minutes. The numbness, tingling etc was completely gone by 36 hours! It was amazing, I often have problems with healing, not just due to diabetes, but I had no problems at all, I would have refused injections tried that in the right side years ago, and caused me horrendous pain, so would not go that route again. I wouldn't hesitate to have the surgery again if I needed it, but two hands, two surgeries, so no more, lol.
Good luck with what ever you decide, it's not something which you should suffer with, there's plenty of treatment available.