Ahh,diets alright but nothing great. Heres an example
Breakfest- 6:00 Cereal, bannana or other piece of fruit
Low on protein and complex carb. Breakfest is HIGHLY important in that it allows your body to refill after possibly being empty for most of the night. You MUST eat a good breakfest. Cereal will not cut it no matter what brand/type it is.
9:00- Peanut butter sandwich, or hamm and turkey sanwich, protein bar, cheese stick
Prepackeged turky in most cases is full of compounds that convert to nitrosamines in the body. Protein bars are usually full of junk. Cheese sticks arn't great. Peanut butter sandwich isn't all that bad however make sure its whole grain and void of any little nasty ingredients.
Lunch 12:00- whatever crappy lunch school has that day. but i always have a salad and piece of fruit.
Missing protein and and complex carbs again. Prepackage your lunch and bring it to school.
Afterschool snack: 2:30 bagel and cream cheese,cashews or other nuts
Workout
Keep the nuts and cheese and toss the bagel an cream
Postworkout

rotein shake, vegetable or fuit
Fruit's are actually very poor PWO's. Many people them with their protein shake unaware of how fructose is digested.
Supper: Usually a salad with some type of meat, rice
Fats,Fiber, and protein should be what a dinner is comprised of. If carbs are used at all they should be complex. Remember your last meal of the day has to last until morning. So a dinner made nearly entirely of protein,fat,fiber will be your best bet to ensure slow and long digestion throughout your sleep.
Before bed snack: mix it up here, usually i give in here and have a couple bites of ice cream or something.
Try some type of cheese and nuts in place of that...
Is my diet the problem?
Electrolytes are in gatorade right?
Sodium and potassium are likely your biggest concerns. From looking at that brief diet run down it looks like your low on potassium. Try adding an avocado into your diet either through your salad or raw. Their full of "healthy" fats and potassium.