Joys of Pregnancy: Heartburn

I have had serious heartburn through the whole pregnancy. At first saltines seemed to do the trick. When those stopped working Cherry concentrate and apple cider vinager worked amazingly. That didn't last. After that mints worked great, then I resorted to tums. Now, my tums offer little relief as well. Tonight I am resorting to constant eating to cure this heartburn. I am now wondering if there is a way to rig up my mouth to chew and eat in my sleep.