The symptoms you describe sound very familiar! I’ve ended up with neuropathy after my first dose of Pfizer vaccine in May of 2021 (I’ve had covid since then too). It was finally diagnosed as length dependent axonal sensory neuropathy a by nerve conductivity testing (after I had to insist!) in Dec ‘22. Studies I have read about post-Covid and post-vax neuropathy and paresthesia (those horrible sensations in your legs) can be an autoimmune response - and very hard to test. They are being treated with some success with steroids or IV immunoglobulins. I’ve struggled to find anything that helps with the ‘fizzing’ legs and burning feet (particularly at night) as I don’t tolerate most medications. I’m currently trying CBD (2 months in) and I’m now adding PEA to see if that helps. Some nights are OK, others are a nightmare. I’ve been given a prescription for prednisone, but the potential side-effects scare me a little, and want to give the CBD a good trial to see if that helps, as I have no side-effects from it. The PEA, in combination, is supposed to help with nerve pain too. I also use compression socks at night, the minute I notice my feet getting hot. When all else fails, I take a few Advil, and that helps - which also makes me think it is an inflammatory response. I hope there is something there that will help.