Progress, not perfection! You cannot be perfect. But you can keep striving to eat well and keep your body healthy. Health is a lifelong process! Congrats on doing the work out program! You will stay strong and keep being strong if you continue to work out as you age!!! As for food - you should eat a snack if you are hungry. Try to eat whole foods, and preferable foods that are high in protein to keep your metabolism on fire

You could have a few nuts, some jerkey, a salad with a light dressing, pumpkin seeds... the key always for me is to eat just a small portion, until I feel full. I have always had problems stopping, so I try to limit my snacks to one serving. Small amounts of food throughout the day will keep you full of energy for school and for your work outs!!
Take care and be proud of yourself

Beth