you may want to give your surgeon a call to see if there is anything you can eat. sometimes they will allow some carrots or celery. I know it's not much, but it's something to chew and may help you feel a little better.
also, try to avoid your 'snacking habits' (i.e watching tv, sitting on the computer, etc) I did a lot of reading and using my kids coloring books, anything to distract myself from my hunger.
I agree that this is the worst part of the process and you've already made it half way! you can do it!