Deb...
good to hear you found good DR. who's aware & taking action on so many issues--from vitamins, malabsorption to small fiber involvement.
My neuro recently told me I have small fiber neuropathy. hope you'll share more ...

I empathize w/ having chronic headaches . Dx's: occipital neuralgia, cervical dystonia, and complex migraines. Hope you find someting that helps your headaches, and your other problems.

good luck w/ tests.
will be looking for your updates