I'm not sure what this is all about. I never ate when taking the Miracle-Mineral-Supplement . I always took it 1 hour before eating or 2 hours after. Always on an empty stomach. My problems, except the day I vomited, were always with the intestines. Bloating and diarrhea. I'm sure I did not have any stomach pain.
I would take 1/4 teaspoon baking soda (bicarbonate of soda) in a glass of water. That will dispel any acid problem, it that is the cause (I suspect so).