its totaly fine, same thing happened to me and the nurse said it was fine. its ok if theres a little bit of stuff, its never going to come out perfectly clear so dont sweat it you'll be fine. it takes about
a two days to get out of your system so dont worry if your going more than normal its just your bodys response to drinking a gallon of laxatives. good luck and hope everything goes smoothly, everythings gonna be ok