Welcome to NeuroTalk.

Many of us deal with pain that is hard to identify and quantify daily.

There is no cure...you need to accept that.

However, every case is different. And something set you off on this path. You need to go back to the beginning, and study your life, diet, shoes, activity, vaccines, alcohol, overseas travel, use of paint and solvents for home projects, well water testing if you have it, any drugs you took for infection (fluoroquinolones), drugs for cholesterol (statins), or other long term medications,
sudden weight loss, poor intake of essential fatty acids, low magnesium intake, low Vit D level....and this is for starters.

You say you had every test? Did you have tests for gluten intolerance including blood work? Vit D level, heavy metals, anti mag neuropathy, Viral titres for Herpes family (simplex, zoster and HHV6) Charcot Marie Tooth inherited genetic neuropathy?

Have you been evaluated by a good podiatrist for mechanical issues with your feet? Compressed nerves, Tarsal tunnel, neuromas, spurs, arthritis, gout?

Dealing with PN is like a detective story. One has to evaluate what they eat daily, how they live, where they've been, and drugs they've taken. You have to be patient and methodical.
I sense alot of anger and frustration from your post so far. One has to really try and keep that at bay somehow. Work it off, so you can attend to your body and not make things worse by overstimulating your nerves with stress.

You can try some topical products, like Biofreeze for burning.
Lidoderm patches, to block the pain signals from getting to your spine and therefore to the brain. Placement of lidoderms is important, to catch the proper nerve. Putting them on the bottoms of the feet where you "feel" the pain, typically does not work. Some people here in the past and present also use,
IcyHot, or Super Blue stuff, and like the Biofreeze these have menthol in them and block burning sensations.

I suggest you read the stickied threads at the top of the page.
There are many links that are informative and interesting and something up there may click for you to use.