I just Binged and I feel Awful?!?

LISTEN don't be hard on yourself because of one bad day sometimes we just give in to our cravings. Now you cannot gain fat in one day because you need to eat 3500 calories over your maintenance. To clarify I eat 2600 calories to maintain, I would need to eat 6100 calories in one day which would be about 11 Big Macs. So to answer your question to prevent weight gain and maintain your weight all you have to do is exercise. When you exercise it burns calories preventing those extra calories that you eat from accumulating to sum of 3500 calories which is 1 lb. So stop with the binge it is not necessary just start an exercise program.