The body reacts to weight loss as if it were starving, and in response, slows its metabolism.
When your metabolism slows, you burn fewer calories -- even at rest. So it makes it almost impossible to lose weight.
If you continue to take in fewer calories, you will either stop losing weight as quickly as you have been, or you'll stop losing weight altogether.
After starvation diets, eating under 1400 calorie per day diets, when you increase your calorie consumption, you may actually gain weight more quickly than you have in the past.
The solution is to increase your physical activity & eat 5 small nutritious meals a day. (Skip sugar, white flour and empty calories that don't fuel your body & help you to stay healthy)
Doing so will counteract the metabolic slow down caused by reducing calories. A regular schedule of exercise raises not only your energy expenditure while you are exercising but also your resting energy expenditure -- the rate at which you burn calories even when the workout is over and you are resting.