This is Dr. David
i am sorry you are having such bad heart burn and acid reflux issues.
there are good over the counter stomach acid reducing medications like maalox, mylanta, zantac, prilosec which could help decrease stomach acid production for you. have you tried any of these?
you may need to go on thyroid supplemental hormones like levothyroxine or synthroid to boost up your thyroid hormone levels.
are you on thyroid hormone medications?