You can do this! Every clinic has a different pre-diet. Mine was 2 weeks of liquids only -- yummy protein drinks . But it does help get you ready and set you in a new mindset for after surgery. Keep your eye on the goal line and visit here often for when you need a positive wordI start my pre op today, theirs is 20 net carbs or less a day, and the day before surgery is liquid only. They recommended lots of green veggies and lots of protein, which is essential, but i feel like 20 net carbs is not alot of wiggle room.
I also was required to do 2 weeks of liquids for my preop. I did not think I could do it and I will not lie and say it was easy. I am not a fan of protein drinks. But I made it and went into surgery 17lbs lighter. You got this!