With a doctors permission you might try inversion therapy , I bought the device to lay on.
This will decompress your whole back off the nerves being pinched.
My disc was shot at S1, L5 ended up with a spinal fusion and now feel great. You have to get a really experienced good surgeon ! Stenosis and symptoms went away. Amazing to me.
That nerve in your lower right back is the sciatic nerve. Pain from sciatica radiates from the low back down the leg and can travel as far as the feet and to the toes. With your history of spinal issues, I sense your problem is more related to sciatica than diabetes. Get an MRI of your low back to see if you have a disc and/or vertebrae pressing/leaning against a nerve.
Hi,
from your description I think your two diagnosed existing conditions can very adequately explain what you are feeling.
Keep your blood sugar under very good control (ideal target would always be less than 140, the level above which damage has been shown to occur) and see a physiotherapist of physiatrist on how to minimise the effect of the back problem.
Best wishes