All the things you mentioned are acidic.

It sounds like you’ve got the first known case of antacid reflux. I recommend one ghost pepper, rectally, three times a day until symptoms improve. And since I’m not a doctor this doesn’t count as medical advice.

And the emphasis earlier was on “good” poo. I’ve had plenty of mediocre poos…even when eating relatively healthy, they don’t compare to a “I’ve been taking fiber supplements consistently for a few days” poo. Those are bliss.