Thanks for the question.
What you have not had is ph testing of the esophagus.
You can still have acid even if the other tests are all negative.
This can also be from sasm of the throat...sometimes a calcium channel blocker will help with that.
It can also be a problem in the cervical spine..the neck, and this is often overlooked.
For this, you would need to see an MD specialist of physical medicine and rehabilitation.
That is a type of MD that can fix the neck and throat structurally with manual medicine techniques, traction, physical therapy, etc.
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