Kristen, it's funny that you posted this as this was my experience this past weekend as well. I have chronic issues with bowel obstructions and pouchitis so when I start to get stomach flu like symptoms, I'm always asking myself whether or not it's a virus or if it's a partial obstruction or severe pouchitis causing me problems. I was in the hospital last year for an issue that was unlikely an obstruction or pouchitis, and it was assumed to be a very serious virus (water-like diarrhea hourly for almost a week).
In the end, this weekend, I'm hoping that it was a stomach bug, because my kids had a bug a week prior. I think you'll have to take each episode as they come. I was able to tolerate foods and liquids the next day and had a full recovery 2-3 days later. I've had partial obstructions that were confirmed by x-ray that were mild like this too though. With my history, I just need to keep on eye on everything and pray for the best.