Ouch, I remember that burning feeling!
Have you tried Metamucil (psyllium husk fibre powder)? I found it helped a lot. I took a heaped teaspoon mixed in a small amount of water – swallow it immediately before it thickens. This creates a sort of cushion around the food. I took it right before eating main meals. (I didn't take immodium.)
Hope this helps,
Sarah