Hi Dee,
Since you only have the problem after your largest meal, I wonder if you might be having the
opposite problem, namely, insufficient stomach acid. When a patient complains of heartburn to a doctor, they almost always automatically prescribe an antacid. However, consider this:
It is estimated that 80 percent of patients with food allergies suffer from some degree of impaired hydrochloric acid secretion in the stomach.
Unfortunately, one of the difficulties associated with hypochlorhydria is that it is often misdiagnosed as the opposite—as having too much stomach acid.
The pain may come from incompletely digested food, and/or gas produced by rotting food, (due to insufficient acid, which allows the wrong type of bacteria to thrive). This comes from the following site, where you can learn everything you ever wanted to know about stomach acid, (there are links to many other articles, there):
http://www.factbites.com/topics/Stomach-acid
I would assume that this whole acid deficiency issue is why some of us find calcium citrate to be so beneficial. The calcium citrate is designed for people who have insufficient stomach acid, whereas calcium carbonate, (such as Tums), on the other hand, is an acid buffer.
You can buy HCL supplements OTC, but if you try one, start out with a minimum dose, and then work up, if needed. If it makes your symptoms worse, then stop the acid supplement, of course, and try a buffer, instead.
Love,
Tex