That's a lot of weight in a short time. Make sure your getting enough protein each day or you will lose a lot of muscle along with fat and water. You don't want to lose muscle because when you get to goal, you will just be skinny fat. The more muscle you have, the more calories you burn at rest, the more weight you will lose, the easier maintaining will be. Putting a time limit on weight loss can set you up for disappointment. Just remember that no matter how much you lose, you will still be doing amazing. Putting too much stress on your self can inhibit weight loss. Add in a good exercise plan and you will lose fat/inches/sizes while firming up. You want to look good in clothes and without. Good luck!