I can't stop eating.....

My surgery date is July 27,05 and I should be following a healthy diet and excersise program given to me by my surgeon and I just can't stick to it, I am hungry all the time, I feel like this is my last chance to eat whatever I want and I also feel that I have enough time to do it before "The Date" and I just don't feel like walking or doing nothing. It's frustrating and I've gain a few pounds already, I'm worried and don't know where to begin with this issue. Am I alone in this? if there is anybody out there that is going through the same, please let me know and also give me some tips to break this horrible cycle. Thanks so much.