I started sleeping in a lounge chair to keep myself upright in order to combat acid reflux. Eventually I got rid of the acid reflux by daily use of prilosec, but am unable to go back to sleeping in a bed, its just too uncomfortable. It does make staying in hotels a problem unless they have a lounge chair in the room, which is not common.
Invest in some triangular-shaped luggage, and use it as a wedge cushion. If you can't find any, invent and market it. :) There's a lot of people out there dropping antacid.