Hi there. I'm sorry to hear your situation. Doctors are gradually figuring things out but it's probably not PEG, which can cause instant allergic reactions, and is the reason you have to wait 15 mins after injection. It's more likely because the spike protein (the thing the vaccine actually makes) remains in your body for several weeks after vaccination. In some cases this causes neuropathy, which feels like burning, because the spike protein can get attached to peripheral nerves, which the body reacts to. In rare cases, this can also lead to autoimmune reactions where the body attacks its own nerves. This typically leads to a numb feeling. There aren't any tried and tested solutions yet but in the meantime I suggest trying bromelain. It helped me. It is thought to potentially snip the spike protein, maybe making it less reactionary and helping the body to remove it. Unfortunately, we're all lab rats at the moment but getting covid without being vaccinated might be a lot worse.