Re acid reflux - please take this for what it cost you - it is a free suggestion.
I DO NOT HAVE acid reflux, so I can't say if this actually works.
I am told that AR results from the stomach sensing too little acid. If true, adding antacids would seem to make the problem worse, but address the symptoms.
As counter-intuitive as it seems, I read a study (somewhere) that suggests adding apple cider vinegar is an effective way to treat AR.
Again, you might want to research this. I am by no means passing this on as a recommendation - just a suggestion that this might be something worth looking into.