Calories

Can anyone help me I am not getting in enough calories on a daily basis with this two week diet? I have my surgery on next Thursday and still can't seem to get the right amount of calories the protein is going good.

My doctor told me not to worry about calorie count as much as staying hydrated while i was prepping for the surgery.  She also wanted me to avoid fats as much as possible, so the liver would shrink to make the surgery easier.  I was on a diabetic liquid diet, so i didn't get any sugar.  I did as much broth as I could--but i had to make my own--add some veggies to the purchased broth and let it simmer.  I ate lots of jello and sugar free pudding, etc.  I didn't have any protein shakes at that point.  I have been using the new lo-carb Slim Fast since I've been travelling--20 g protein and only 6 carbs.