Hi, you need a customised diet plan which will account for your nutritional requirements and which can be fitted into your daily routine. Till then you can start by adopting following:
1. Stop/ minimize outside food including food from school/ college canteen. Carry home cooked food.
2. Try to take 4 meals with 1 or 2 mini snacks in between. Avoid starvation or extreme diets.
3. Choose healthier breakfast items like oats, chapati, museli, eggs, idli, dosa , Poha. Limit bread and Bakery items.
4. Limit oil intake and fat containing foods like paneer, sweets, peanuts, farsan, red meat, cheese etc.
5. Increase fluid consumption, through lemon water, buttermilk, infused water etc.
6. Start exercising, take brisk walk.
Next Steps
Consult a physician for any medical condition. If everything is normal then consult a qualified Dietitian for customised diet plan.