Ouch!

It's common for the intestines to go on strike for a while after surgery. It's called a post-operative ileus. It's miserable, but you should be fine. They probably won't discharge you until there's evidence that your intestines are moving, since you might need a naso-gastric tube if things get backed up. Mine lasted 10 days...

Welcome to the j-pouch club Sally

Urinating was my biggest problem after surgery.  I thought about that when you wrote about your tummy pain.  It's bad enough to have the pain from surgery and adding pent up gas and fluid makes everything worse. 

Hopefully your new plumbing system will wake up soon.  Walking isn't too much fun at first but the more you walk the better for your recovery.