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If you have had some borderline sugars...you could have pre-diabetic neuropathy. Doctors just don't understand this.

I'd get a fasting INSULIN level drawn, and if it is elevated, that would point to this problem. Also get an HbA1C.

Some supplements may help you. Have you had B12 and Vit D measured? This should be done ASAP.

Also do you use statins for cholesterol? Or have you taken antibiotics recently... Flagyl, Cipro or Levaquin? These may cause PN. Yearly flu shots? those may be problematic too.
Many other things, including toxins, should be looked for.

There are things you can do for yourself. But they won't be covered on insurance, so you need to decide if it is worth it to you to try them over the counter.