@wpshooter I’ve been mulling over your post and doing some research. It seems many doctors are dismissing your condition as GERD and treating it as such. Have they done any testing such as a CT scan with contrast? I had gastric bypass 10 years ago and suffer from GERD. One time I went to the ER with excruciating abdominal pain and nausea. They did a CT scan with contrast ( I kept turning, rolling so much I felt like a piece of mean being cooked on a rotissiere!) They found I had gallstones, confirmed GERD but no other issues. While I’m not a doctor, I don’t see how there is any difference in being awake or asleep would effect Acid reflux or Bile reflux, which you can read more about here: Bile Reflux http://mayocl.in/2pZRwdN
I would venture a guess that you may not notice reflux during the day from food or liquid in your stomach preventing the burning sensation.
As far as vivid dreams, I’ve been treated for them for about 15 years now. The link that @kanaazpereira gave for Sleep Health is very useful http://mayocl.in/2oVAlwA. I was diagnosed by a psychiatrist with sleep terrors and currently take Trazodone to ‘turn off’ the brain so I feel rested when I do sleep.
wpshooter, Have you seen a doctor for your sleep issues?