Pre Surgery ARGHs

today I'm having one of those days where I question everything - I don't even have a surgery date set yet, it's that far in the future. I'm just questioning my decisions because this diet is getting really hard to stick to - I'm consistently either OVER or under my calories, and while I'm under the carbs, my Protein is too high (is that even POSSIBLE?!) and my fats and sodium are too high also (sodium especially). It just makes me wonder, if I can't make it through THIS part how am I ever going to actually make it through having the sleeve done or into life beyond it?

I want salt. I am DYING for something crunchy and salty and there isn't anything I can have that fits that category... definitely not today anyway, where I'm over my calories for the day by 70.

Stupid whatifs. Stupid arghs. Does anybody have any similar experience fighting this? What helped you get through it?