RSD/CRPS has severe sensitivity, burning, swelling, skin and color changes.
We have a forum for RSD if those seem to fit.

sometimes you just need to keep seeing different doctors or therapists until you find one that can help you.

It helps to clearly describe your symptoms and the treatments that you have had already to the new doctors - so they know what has been done and checked already.
Have you tried a very good chiropractor?