Welcome to NeuroTalk:

We have to have some background on you, to see if some supplements may help you. Some PNs are environmental, meaning you were exposed to something that affected your nerves. So going back to when this started...is important.

I bet you are taking statins for that heart problem! Did this start after you began taking cholesterol lowering drugs? Most stent patients are given statins, and these are known to cause PN.

Have you had an HbA1C test regularly to see if you are becoming insulin resistant, or prediabetic? A glucose tolerance test longer than 2 hours? Have you had thyroid testing? Some PNs are metabolic and secondary to pre-diabetes and diabetes, and low thyroid functions.

Have you been tested for B12 levels and Vit D? Get your numbers and don't accept "normal" as lab ranges in US report lows below 400 (the new suggested lower normal) as normal, when in fact they are low.
Some PNs are due to low B12 and Vit D and other factors, so some supplements may help. Knowing your dietary habits will be a clue here.
Some drugs like metformin and acid blocking drugs lower B12 as side effects.

There are toxins, solvents, and other drugs that can cause PN.

There is a hereditary type of PN also that has no treatment as of yet. It is called Charcot Marie Tooth.

Do your hands bother you too? Or is it only the feet? Are your feet cold, do they change color frequently? Do they hurt when you lie down more or less? Do you have times when they don't hurt? Some PN may be from irritated or compressed nerves in the spine. Some PN can come from poor blood flow and poor circulation to the feet.
If you have blocked arteries in the heart you may have blocked blood flow in the arteries in the legs. Do you smoke?

Have you had tests for inflammation (C-reactive protein and SED rate)? ANA tests? Tests for immune globulin elevations (protein in the blood).