First of all, keep calm, don't panic, and let your mind calm down is the best way to fight depression. Secondly, you can communicate with your family, friends or teachers more, and don't tolerate negative emotions. It will be much better to get rid of it, and you can also release negative emotions through proper exercise. Finally, believe that you can be cured, and don't always think that you are a patient. Of course, if necessary, you should go to the hospital for professional treatment.
I hope all people suffering from depression can recover, come on!