The calories aren't your focus on Atkins - put calories out of your mind! The only thing you really need to keep in mind is the carbs. It really does take a while to let go of the usual way of dieting but when you start to feel the energy rising and the clothes getting looser, you'll know it's working. Be sure to drink enough water too, and come Monday you'll be in for a pleasant surprise on the scales.
GOOD LUCK!