I suffered really bad from heartburn and reflux!
Tums or Rennies worked for me. They are both safe!
Had to stay away from vegemite, sweet chilli sauce and anything fizzy......I hated not being able to eat vegemite but that upset me the worst!!!
If you use the Tums or Rennies make sure you have nearly as soon as you finish eating and they will help!
Also do keep propping yourself up whilst trying to sleep cos lying down absolutely killed me!!
I understand what you are going thru!!!