It varies a ton per person - I know that I often, for example, end up with the opposite of acid reflux (essentially my stomach is too basic). I would have similar symptoms and take an antacid and it would make it immediately WORSE.
Not sure if this is why but I am also one of those people that can eat super acidic foods all day no problem - I can drink black coffee and follow that up with a bunch of citrus and feel great.