@mikeyB, thanks for your interesting comments.@JMV you say your fingertips are very sensitive. That doesn't sound like diabetic neuropathy to me. Like @Pumper_Sue, I reckon a neurology referral would be in order. Sensations that you experience could be caused by a neurological disorder - I have PLS, a variant of MND, so both Sue and I know from past experience that a neurological referral is appropriate. If you do get a neuro appointment, don't expect a diagnosis. All neurological diagnoses are diagnoses by elimination, because of the similarity of many conditions. And interesting tests - one of the standard ones I had was for tertiary syphilis!
In the meantime, I don't think that amitriptyline will do anything other than make you dopy, but what you could try is CBD oil, both Sue and I use it. Doesn't make you dopy - in fact there are no side effects. If it doesn't help, try a stronger dose. It doesn't work for everybody, but when it does it's amazing.
Finally, you will face the relentless phrase "It's the diabetes". You have already experienced that at the first presentation. It may not be the last! It took me 2 years to get past that one, and five years to get a diagnosis. Mind you, PLS is a very rare disease, everyone who has it in the UK could gather in a tennis court and maintain social distancing. I'll tell you that you don't have that, it's entirely a motor neurone problem originated in the brain. Or what's left of it!
Yes, I've heard lots of good things about CBD oil too.
I will see what the neurologist has to say, when I eventually get to see one and will continue to follow my own intuition regarding whether whatever it is is diabetes related ;-)