Yikes! Another nasty condition to work with…I am so sorry that you are going through this. After reading about POTS, the constant discomfort in numerous directions must be terrible.
As I was added to this conversation, will tell you about similar symptoms I had, but not diagnosed. I had inguinal hernia surgery, and I believe much of the abdominal pressure and discomfort was caused by it. Relieved. Also, not sure if this fits in, but have a severe hiatal hernia that was not repaired but doctor gave me a plan to stop pantoprazole over a period of months, and I don’t have any further gastric issues. God bless him!
I hope you find some comfort with your problems…