Did you eat or drink anything this morning or a few hours prior to going? (even water) Watery diarrhea like that just means your colon is irritated and something passed RIGHT through VERY quickly. I doubt it was from last night (although what you ate last night could have irritate the colon, but if the chicken made you go you would have had the watery diarrhea about an hour or so after eating it.)
I think you are fine, just an irritated colon from what you ate last night. With that said, don't eat anything irritating (stick to one of the things in the BRAT diet the first time you eat today and see how that is (Banana, Rice, Apple, Toast) If it's fine then eat something heavier and see what happens. It may be a very slight irritation and you won't be bothered again.