I don’t think stress has much to do with it at all. That stricture could be significant. Do you know where it is? Flagyl and Cipro won’t help a stricture, so you need to find out if it can/should be dilated. Do you have a regular gastroenterologist that you trust?
The stricture could have been caused by chronic inflammation, so it’s important to pay attention to the pouchitis even as other things distract you.