trigurl, have you tried using FitDay.com to see what kind of calories you are putting in and what % of them are fat, carbs and protein? I know that when I eat a 20% fat, 60% carb, and 20% protein, I am starving all the time. It might be worth a look to track your food for a couple of days and see where you're at.

Three foods that have helped me feel fuller, longer: (low fat) cottage cheese, oatmeal, and hard boiled eggs.

Also, I don't think you can gain 5 real pounds over the course of a few days. If it takes 3500 extra calories to gain a pound of fat, that's a helluva lot of eating. Are you PMSing? Eaten a lot of sodium over the last few days?

Hope this helps.