Speaking from first-hand experience:There are several things you can do. First and foremost seek advice from no less than 3 doctors specializing in that field. I suggest the Mayo Clinic in AZ should be one of them. Several very important suggestions: don't eat for 3 hours before going to bed (this is very important). Don't eat and recline. Don't eat high acid producing fooRAB (see online info...there's a lot of it). Some say raise the head of your be a few inches or just use several pillows. However, that will do no good whatsoever. You need to raise your upper torso from about waist to the point your hear is 7 inches above your waist. Either purchase a bed-wedge or an elect adjustable bed (duel 80" twins when put together side-by-side = a King bed. They are quite nice, come with wireless remotes and many nice features. That is what we opted for).
The most important thing you can is my first suggestion: Seek expert professional care in dealing with Barrett's. Do your homework before you have any procedure done. Many procedures to ablate Barrett's can cause a stricture, which can be highly dangerous in and of itself. If I had it to do over again I would go to the Mayo Clinic in AZ...they specialize in the treatment of Barrett's esophagus...more specifically Doctors Virender K. Sharma and David E. Fleischer. Look them up online. Give them a call. Good luck!