Thank u all so much for your replies! Glad to know someone is listening. You have no idea (then again I think many of you do) how many tears I have cried over this.

I cannot rememer all my tests, but the ones I do remember I will list:

Basic blood work - normal
Auto-immune panel - negative
Liver panel - elevated liver enzymes (probably due to fatty liver)
2 hours glucose tolerance test - indicate insulin resistance
thyroid - normal BUT thyroid uptake scan show hypothyroidism
B12 - 209 - normal according to the doctors
Hepatitis - negative
HIV - negative
Brucelloses - negative
Epstein barr virus - previous infection noted but not active
Cytomegella virus - previous infection noted but not active
CT scan of brain - normal
MRI of brain - normal
MRI of spine - show some disk problems, but according to neuro everyone gets this with ageing
Nerve conduction study of hands and feet - normal
CT scan of abdomen and pelvis - normal
porphyria - negative
colonoscopy x 2 - normal
gastroscopy - chronic gastritis due to H Pylori infection

this is all I can remember for now. I know no tests was done for small fibre neuropathy. I've decided to stop my Lyrica as its making the burning worse.