1. Expression kills depression. Talk to your loved ones, share as much as you can, and if you don't have anyone talk to yourself, and if you can't even do that, talk to any God in whom you have faith. Writing regularly also helps in expressing. 2. Be busy be happy. Depression needs time to survive, make yourself busy enough not even to spare any second, depression would cease to exist. Use internet and entertainment to pass any extra time. (Avoid social media though) 3. 5 am to 7 am cure. Reserve hundred minutes each morning and spend them systematically, 20 minutes for meditation, 30 minutes broad walking, 20 minutes exercise, 30 minutes breathing exercises (pranayama), nothing can beat this if you adopt to it. 4. Medical treatment sometimes does magic on depression. Excellent medicines with minimal side effects are available for depression and anxiety. All you need is to be bold enough to visit a neurologist, or a psychiatrist, if you can't get support from family, book an appointment and go alone. 5. Clear the environment around you. Stay in cleanliness, eliminate negative people from your life, wear neatly ironed clothes and accessories, don't watch any negative shows, news, and movies.

You might be experiencing what is called as a panic disorder, a type of Anxiety Disorder.

Please consult a psychiatrist urgently, you are loosing important study time and may underperform during exams.