Colonoscopy Prep Question?

I am 32 and scheduled to have my first colonoscopy on Monday in the am. My prep is 4 Dulcolax tablets at noon Sunday and 238gm of Miralax mixed with gatorade startign at 3... drinking 4 oz gles every 10-15 min till its finished. Has anyone had any experiences with this prep.. good or bad? WIll I throw up?