It’s often worth trying Cipro or Flagyl when pouchitis is a possibility, because it offers such a simple solution. OTOH I don’t think pouchitis ever causes heartburn. J-pouchers are subject to the same common GI problems as coloned people, and my guess is that you either picked up a GI infection or just the consequences of overindulgence with a sensitive gut. Lots of people have experienced those things. Maybe try a drink at home rather than waiting until you’re in Jamaica for the next test? I’d also recommend moderation when you’re there, but that’s a very personal choice.