Truthfully, are you surprised with all the changes that your body has started when consuming all those unneeded calories over the past couple of months? Do not be. 

First off you will want to understand, the metabolism in your body will begin to slow down after the age of 20, every decade, by 2%. That means every year burning calories starts slowing down. 

Results of this is that you will want to be more careful as to how many calories you intake as you age. You can determine that by calculating your BMR, or basal metabolic rate: 

- Step on those scales and see what you weigh.

- If you are a woman, multiply it by 11; if you are a man, multiply it by 12.

- From the total subtract 2% for every 10 years that you are over the age of 20.

- Then add 10% to that total. This is the number of calories that you need on a daily basis. 

If you want to lose those unwanted body fat very quickly, controlling your calories is the key. Push yourself to achieve these goals, and know that you can do it.