48hrs till the start of pre-op diet

I start my 2 week liquid diet tomorrow...I think I am going to be soooo hungry not to mention I am pms-ing which always gives me he munchies I know I will still to my guns and do what I need to do BUT can you vets offer me some advise on how to get through this phase with ease...because of course now that I wont be able to eat junk I think Im going to want it more. Also I keep thinking Im going to be a failure after surgery....I tell you the devil is really playing tricks with my mind     

I'm not a vet on the surgery but I have done a liquid diet before.  Try Walker Diet Shake Mix, it a Meal Replacement and it keeps you full a very long time it has 24g protein and 7 carbs which 6 is fiber  It calls for 2 scoops but I'm 2 full with the 2 so I do one now then one later it does contain sucralose for those who have allergies.

Im gonna give it a try thanks!