I have autonomic neuropathy / pots / sleep apnea / GERD / 1st degree av block / gilberts syndrome / doctors cannot find my cause for an and pots?

Hospital setting. I would consider being referred to some sort of hospital setting, like mayo clinic, that can have you be seen by several related departments and get collaboration of the findings and tests.
Frustrating. Pots and autonomic neuropathy are frightenly complicated, particularly when the symptoms don't respond to first line therapy. There are a lot of things that don't get tried, though. Do you get regular exercise? Are you depressed? Have you seen a specialist who has specific expertise in autonomic dysfunction. Typically, these people live in large cardiology sections in academic health centers.