I am sorry to hear all your suffering. Camera means endoscopy? How about blood works?
Sleeping upright might give you upper back pain especially since you are on ppi and it robs your calcium and magnesium.
It does sound horrible. You should feel better at least temporaily with all the drugs you are having....and you are doing all the right thing, too.
Why don't you go in ER if you are having such a hard time? I know it costs money but i've been to ER for the stomach pain and while they still wouldn't give me an endoscopy because it was set a weeks later but they checked(blood and urine samples and pressing tummy etc.) me to see if i have other problems like gall bladder, liver, pancreas.
It was stomach muscle spasm and in the end ER didn't help me at all :( but but at least ruled out more serious problems so that i could have peace of mind until my endoscopy. After deductible kicked in everything started to be covered by insurance 80% plus ppo discount so the cost was bearable, too.
Let me know how things work out and pour out your heart here when you have a hard time at least so that you would have a temporary relief and morale support. I will be here for you. 'Cause we, here, understand you.