I'm sorry to hear about your chronic heartburn problem, and I wish I could help. I'm going throught the same thing right now, unfortunately. This happens to me occasionally, and I used to be able to fix the problem with no worries. There were two products on the market that worked wonders for me: Twin Labs Stress Formula B-50 and/or GNC Mood Formula.
Both of these products contained exactly the same ingredients. The only difference was that the Twin Labs product was in a capsule form, and the GNC product was a tablet. I've been looking for this product for over two years, as I'm always getting getting into trouble with heartburn that won't go away. No one makes it to my knowlege, and I've contacted both Twin Labs and GNC to see if they plan to start selling either one again. GNC sent me a copy of the lable, but that doesn't do much good. I need the product - not the lable.
Now I'm stuck with Larry the Cable Guy, instead of a healthy lifestyle.