Identify the cause and you will feel better since you will have the right attitude towards what you face every day. Take some rest and ensure you always have enough sleep and replenish your lost energy and take reasonable amounts of fruits and fluids daily.
It is important for you to visit a profesional couselor, either a psychologist or psychiatrist. They can determine if your condition can be treated with counselling or drugs.
I would recommend dealing with any situational problem areas of your life. And, cheesy as it sounds, stop telling yourself you're depressed, change your narrative! Its positive psychology!
