If you have made it since 1999 without major problems, then that should be a good sign. I got my pouch in 1999 and get pouchitis maybe once a year, sometimes more, sometimes less. Cipro did not work for me (I only tried it once, so it might work). My go to is Levaquin and Flagyl. Levaquin has some known side effects, but all I get is muscle pulls. I hate Flagyl, but it works. I've tried the Pepto and the probiotic stuff for pouchitis, but I feel like by now if I have pouchitis, I need antibiotics. Once it clears up I go back to the probiotics.
Levaquin will get some bad press, but it may be worth trying it. It has worked for me for 20 years.
I take Levaquin 500mg once a day and Flagyl 500mg three times a day. The shortest I've been on these is 7 days, the longest is 30, but I think around 10-14 days is probably good. Definitely watch your sugar intake to head off pouchitis. I find stress does not help, or change in routine. I'm dealing with pouchitis now, probably due to the change in routine due to COVID and all the sugar I have eaten as snacks.
I hope you get better soon. It may be worth dealing with the Flagyl for a week.