Uhhhh it depends
You can have mild depression, where you'll just feel bad about your current situation. It goes away as you make lifestyle changes I think.
Then you have cronic depression, which is where you'll feel like shit on and off at random intervals throughout weeks or even months. This is what I have because despite being depressed, I still have enough willpower go to work and take care of myself.
Then you have severe depression, where you feel like shit 24/7, lose all hope, literally don't care about showering and dental hygiene, eating ect. It basically feels like a rock in your chest and it hurts for some reason?