Advice

I have a colonoscopy on Monday October 26 at 710. I was given instructions that no one else ive talk to have been given and I do not have any constipation issues or any stomach intestinal issues at all. So why all this intense l prep and how will I feel. Sat 1 pm 2 dulcolax. 6 pm 32 onces Gatorade with 4.1 ounces miralax. Sun liquid diet only and at 6 pm drink 1/2 gallon Golytely then other half at 1 am . Sounds like I will be getting no sleep, starving with low sugar headache and just miserable. Has anyone experienced this type of prep.