What if I have to use the restroom during colonoscopey?

Im having a colonoscopy in the morning and am doing my prep now. Im a little nervous to say the least but since I know I will be asleep the whole time I know I will be fine. With all the water and prep stuff, what happens if I have to go to the bathroom during the colonoscopy. I know with as much water as they told me to drink I will have to urinate. Also concerned about a bm since all the laxitives and all. What happens?