Welcome to NeuroTalk:

I am sorry, Allan, you are going thru so much.

With kidney failure, this limits what you can do to try to heal.

But after all this time, and your complex spinal compressive injury, there may be permanent damage.

The diabetes factor? What do you do for that? Do you use metformin? Do you know your A1C reading?

Have you ever had your B12 tested? Metformin and acid blocking drugs impair B12 in the body. If you are low in that,
it can be addressed. But some people with poor kidney functions may show elevations in B12. So you will need to have a test before taking any on your own. You should test at 400 minimum...and don't accept "normal" from your doctor. Lab ranges in US are low, and out of date.

Any supplement you could try may be limited by your low kidney functions. Also chemo causes neuropathy, so you have potential damage from that.

So at this time, testing for B12 and discussing pain management with your doctor is about all you can do.

Some posters here with severe PN pain have used the fentanyl patches. But you would have to discuss with your doctor whether they are safe for you and your kidney issues. They are only given to people who have been on oral narcotics for quite a while, since they are so strong.