Pre-Op diet

I am having a hard time with this now. I found myself a tracker (see end of posts) and hope to be inspired by it. My problem is that I am always hungry. I drink alot of water and have been adding herbal tea just for a change. I am using Herbalife protein powder for breakfast and lunch, with a "cup a soup" (50cal) for a mid aft. snack.
Dinner consists of a "Weight Watchers" dinner but by late evening, I am snacking away... can't stay away from the crackers and peanut butter.
After stepping on the scale this morning and not seeing a drop yet again (3 days in a row now) I am determined not to snack tonight. I need to lose this 15 lbs by next Sunday! This is the day we will be arriving in Mexico, and my lapband surgery is scheduled for early Monday morning.

On another note, I have been reading alot on the forums and am getting excited to start really losing weight. I have a first goal date, but not really an idea of what I can lose by then since everyone seems to be different. I also will need to go buy a new blender in order to eat my "mushy stage" food...

some other thoughts about losing weight...How am I going to feel as a skinny person. Will I still see myself as "big"? I have had the problem of not really seeing myself as I am now, I tend to think of myself as a young mom, not overly big and when I look in the mirror, the person looking back doesn't look that bad. However, I look at photos and they tell me a different story! We were in Mexico a few weeks back and I hate the photos... I am huge... my arms are as big as a small person's waist. Could this possibly be me? I dunno... I think I am going to have a few demons popping up with this journey. Wish me luck.