Your health issues sound similar to mine with Fibromyalgia and many other issues.
The muscles in my lower esophagus don't work properly due to nerve and muscle damage in lower right abdomen and pelvis.
A GI DR told me to drink chamomile tea when gets bad
Do believe it helps me.
I also have neuropathy for no reason. Have been told by a couple doctors if you have any nerve issues in your body, can hit other areas of body also.
Since Fibromyalgia is now known to be from central nervous system, maybe these are having some of your issues.
Don't know if this will help you any, but know I feel your frustration and pain. Took me many different specialist over years of trying to figure out what's going on with my body. An awesome dr that will listen and doesn't care if you go out of the normal western medicine for you to find help.
Have you tried acupuncture? Do believe that and massages are the two best things for fibro.
Take care of yourself, you know your own body and what type of pains, etc you deal with. Don't ever let anyone tell you what your going thru is not real.