7 lbs of roast beef?!!! That's like the size of a small tv set. Are you sure it was that much? I doubt you could fit that much in your stomach, and if so it's way too much protein. If it was from a deli, it might also have carbs in it as well. The rest of the food you ate sounds okay as long as the dressings are low-carb. Some people stall on diet soda and coffee, it all depends on the individual. Make sure you are drinking enough water on top of that and add some fat in without all the protein (cook in butter and oils). You can check your percentages by plugging everything in on www.fitday.com. Your calories should come out something like this for a typical day of low-carbing: 65-70% fat, 20-25% protein, 4-6% carbs