cheating on pre-op liquid diet

My surgery is scheduled for Tuesday (YAY!) but I am finding it so difficult to follow liquid diet. I feel like it's my last time getting to eat real food. I will have one shake and one real meal or just one meal per day so I am staying under 1000 calories. I have lost about 10 lbs in 1 1/2 weeks but am stressing myself out-which makes me want to eat! Am I really screwing things up..? I did great for first week.