you can't take in more than 1,000, that is all. walk, walk, walk drink plenty of water,
5 pounds is too much to lose in one week. Safe weight loss is considered to be 1-2 pounds/week.
Since a pound consists of 3500 calories, you'd have to burn 17,500 calories in order to lose 5 pounds. And don't forget that you also have to eat during the week, which means you'll also be taking in calories.