That'll be up to your doctor, DrDoja. I can't tell you for sure that they'll cancel the procedure, but if you haven't cleaned out your gut, they definitely can't go through with the colonoscopy. Here where I live, they don't usually want to do procedures on people who're sick because the risk of infection and complications is higher, but that certainly doesn't mean that's standard procedure across the board. Your doc will have to decide what to do in your particular case.

You might want to put in an after-hours call to your doctor and let him/her know what's going on with your cold and the fact that you can't keep down your electrolyte-laxative solution.