I can see why you'd come to that conclusion, but I think you would be better served examining the causes of the excess acid. The bypass removed a symptom, most certainly (Barrett's is a naming if symptoms, not causes) but gum disease is caused by bacteria that need to be living there awhile, and your extended vomiting weakened the enamel absolutely. But that still wasn't instantly fatal. Folks here are writing that stomach acid is pH 3 or less- as a biochemist, I've worked with those concentrations and the other extreme on the alkali side. You cannot even breathe those vapors safely, much less have any skin contact.

Normal stomach levels are not that acidic and should not be. Imbalances cause our bodies to flood the system with things that start chain reactions that won't return to balance until the aggressor trigger is resolved, for example, fever. Fevers are normal to kill off invaders, unless they get out of hand because perhaps vitamins are at lower than optimal levels, or some other exhausting circumstance. I can't comment on your personal medical history with scant information; we tend to want a single source of a problem with a single solution, which is easier than holistic examinations of our lives, environment, pharmaceutical input and nutrition, and which makes us easier targets for the pill-pusher model of doctor's offices.

Here's a parallel anecdote, just as valid as yours: a relative was having excess acid and heartburn, ulcer, etc from it. Docs gave him pills and sent him off, again and again but things kept getting worse, so pills got stronger and caused other side effects. Which of course required more medications. Finally a wise family member did an intervention and brought him to a wiser doctor, who talked with him for an extended period of time and drilled into his diet, career, family life etc; his job was causing ridiculous amounts of stress. Doc strongly suggested he quit that job. The relative wisely took the advice and was back to perfect health within a month. This was over 50 years ago, in another country. The Rockefeller big pharma medical hegemony has been in place a long time and we are enslaved to its misinformation only as long as we choose to be.