Feeling tired after i come home from school?

WHOA. You should be exhausted! A change needs to happen. Your priority is school and if you are too tired to study you will not get good grades. It doesnt do good to spend time at the gym when your body is not getting enough good nutrition through diet. You need a balanced diet of healthy foods( protein, carbs , vegetables, fruits AND fat- for your age and growing) So start with sleep: go to bed at 9 30. Then plan a nutritious diet . Skip the gym for a while as it is taking its toll on your energy.( you can resume later) Spend more time on eating well and studying. You are wise to not take pills or vitamins as they are not absorbed as well as the vitamins within the food you eat. I admire your ambition and know you will be successful if you only make a few changes now