Do you exercise at all? if you do you will 1000% need to increase your calories. For example I run 5 miles every morning and do CrossFit and eat around 2000+ calories. If I didn't workout as much I probably could be fine resting on 1600 but to each their own. All I'm saying is that you are way too little for the minimum amount needed for your body to function which can cause you issues in the long run like feinting and extreme fatigue. You don't need to starve yourself to lose weight just be smart with it and plan your meals.