Hey Maddie! Please don't starve yourself, it will only make things worse. It will slow your metabolism down so you actually won't burn as many calories, your body thinks it will not get enough food so it starts holding on to as much food as it can, and using less energy each day. So when you eat normally again you might GAIN weight. You say you are gaining weight, well don't go by the scale, you may gaining muscle which weighs more than fat. You should go by how your clothes are fitting, if they are getting looser than you are losing fat! Try keeping track of your progress by using a measuring tape, measure your hips(butt), waist, chest and thighs. (Also if you do weight lifting that would be building more muscle than cardio) You will see that you WILL lose weight as long as you are eating less calories than you use, and doing cardio every day helps a lot.