You might feel that way at first because you're eating foods that in your mind make you fat. Just make sure you know what you're eating and be confident that it will work. Check to see if you are in ketosis.. If you are, and you aren't eating above maintenance calories, then you're losing fat.. As far as water, until you carb up, you shouldn't hold water. Ketones have a diuretic effect, so the opposite is true.. You'll drop water, and your muscles will get flat as they dump their glycogen and water.. That can make you feel fatter too. Your muscles getting flat may be making you look smoother than you were, but don't worry, when you carb up, they'll come back.