I have major problems when sleeping.
I have been diagnoised with Chronic Dyspepsia. (Generic term for stomach problems that the docs don't really understand)
I have a really hard time at night, if I have the slightest bit of wind or reflux at night, i get pain in my arm and chest when I lay down, (when I say "lay down" I mean sitting up against 4 pillows). I know that if I try to go to sleep with even the slightly bit of pain in either my chest or stomach as soon as I start to drift off I will end up sitting bolt up right gasping for air. It is highly unpleasant!!!
So I can really sympathise with you.
I'm thinking about going back to my GI or GP as it's starting to get worse again. I have had an endo and it was all clear.