Weights not budging. What am I doing wrong here?

For the last week, I've been going out - in the cold, cold rain - and walking/jogging 2 and a half miles every morning. I radically changed my diet. I sleep a full 8 hours at night. I drink a crap load of water. Yet to my very unpleasant surprise this morning when I weighed myself I hadn't lost a single pound. Not a great way to start the morning.

This has been my general eating:

Breakfast - 2 whole eggs, 2 egg whites, Two pieces of toasted wheat bread, Two pieces of fat free turkey lunch meat, two pieces of fat free cheese, fat free yogurt, water or diet soda.

Morning snack - fat free yogurt/bagel with fat free cream cheese.

Lunch - boneless/skinless chicken breast baked in the oven, broccoli side, and more yogurt.

Dinner - More chicken, or Salmon, with broccoli and a diet soda or water.

Snack before bed if I have one is a banana or yogurt.

I doing something wrong here?