for many people, the cravings remain as long as they keep ingesting artificial sweeteners. Also, you could have a food allergy you don't know about that is triggering general cravings. Or you might be undereating and so just plain hungry! Skipping breakfast can cause poor blood sugars throughout the day...lots of possibilities.

I'd do two things--well, three really. Cut out the diet pepsi, start a detailed journal here so people can review your food and make suggestions, and the third thing (hardest advice in the world to take and easiest to give, I know!) is be patient. Two weeks isn't a lot of time out of a whole lifetime spent (if you're like me) in abusing food...it can take longer for the body to straighten itself out.