If the antibiotics help while you’re taking them (do they get you to baseline?), but stop working when you stop taking them, then it might be that a 10-day course is too short, or you need to add an additional antibiotic or try a different one. If none of that works it’s possible that the pouchitis has become chronic, requiring ongoing treatment (antibiotics or biologics).
Is your appointment with a surgeon or a gastroenterologist? I’d tend to choose a gastroenterologist at this stage.
Good luck!