So the surgery was done by endoscopy only? Down your throat only?

Not laparoscopically?

Are you calling endoscopy a "surgery"? Was there cutting done or
removal of tissue for examination (biopsy)?

Pancreatic pain can refer to the back. If you have some issue with the pancreas, then the pain location you have could be connected to it.

If you have problems due to pathology of tissue, or damage from the scopes, I doubt that most of the supplements will help.

Tissue damage (trauma or surgery) responds for healing to zinc, Omega-3 fatty acids, B12, folate, magnesium, and protein. These are typically given to repair damaged tissue.

If your antibiotic was Levaquin, then that too could damage nerve tissue. Dr. Cohen suggests magnesium for that.

There seems to be a strong connection to the timing with your procedures. Doctors will not admit to damaging you.
What is your status now with the esophagus? Do you have trouble swallowing, pain and heart burn or whatever there?
When you were released from the surgeon what did he say about your outcome and results?