Thats right, you tell this DD whats up! I do the same thing when I know I'm going out...like today my bestfriend is takin me to the Cheesecake Factory for lunch for my birthday (which was a month ago, but I was in the hospital having a freakin bowel resection) Ive found it helps if I dont think about
my stomach while I go out I'm usually "ok", I dont mean like disregard it or anything, but dont over think things too much like "what will happen if I eat this....? I wonder where the bathroom is?" ect ect. Just enjoy yourself and take it easy. If you feel your stomach is going to act up after dinner, go to the bathroom before you leave, then maybe try and go again right before the movie. I hope you have a great day!