Hi brittany,
if you're not happy about your body and want to change it, then all the power to you. I would much rather find motivated individuals like yourself who do something about their unhappiness, opposed to those majority who complain about the problems in their life, or with their body, but do nothing about it.
First off, we're going to talk about nutrition since apparently you've had a run in with eating disorders. (according to a post above.) first thing you must learn that to lose weight, to get that sexy model body, you must eat... *however*, you have to eat the proper foods. Not all food will make you gain weight! Get this misconception out of your head! There are so many different types of foods out there, choked full of vitamins, amino acids, proteins, etc. You need to understand proper nutrition and eating the appropriate foods throughout the day will actually help you lose weight. One example is that whenever you eat your metabolism increases to break down the food and utilize it. Your metabolism increases whether you eat a few crackers, or a full meal. As soon as your body senses food in your stomach, it goes into action to break this food down. This is why eating small meals throughout the day will help you lose weight, since your metabolism will constantly be boosted up. (opposed to only 2-4 meals per day.)
second, you need to do your exercises in the mornings, not middle or end of the day.. You'll burn much more fat this way. Also, you must understand that the harder you work does not equal burning more fat off. Light/moderate cardiovascular/aerobic exercises for an extended period of time will burn more fat off! (this means a light jog for 1 hour is much more effective than sprinting and sweating till you feel like you're going to collapse for 20 minutes!). Slow, steady, long period of time. Eat throughout the day. Coffee in the morning can help a bit.
If you need more info, just ask.
Justin