I'm going to 2nd the first week as mainly water weight. My first week I lost 6.
Also 1-2 lbs is a normal weightloss range after the first week or so. You might want to add some fresh or frozen veggies to your meals just because frozen dinners tend to be starch heavy and vegetable light. Also check out a BMR (base metabolic rate) calculator (
http://www.bmi-calculator.net/bmr-calculator/ ) to find a good calorie range for you. I started out at 286 and 1500 calories but very shortly the weight loss slowed. Then I bumped it up to 1900 which is my current bmr and it's started coming off again.