Well there are several types of depression, major depression, chronic depression, bipolar manic depression as examples. Symptoms of depression can include an extreme feeling of sadness, sometimes you can’t sleep or you sleep too much, you cant concentrate, you feel hopeless, you have negative thoughts that you cant control no matter how much you try! you can lose your appetite or sometimes you even gain appetite. You can be easily irritated. And at its worse, you feel like life isnt worth living and suicidal. To know what type you have, you will need to go to a doctor for an evaluation! Please do and take care!
Depression is pretty much individualized. Some symptoms are prevalent in some people while other symptoms are prevalent in others. There are so many symptoms, but I'll list what I was affected by.
Destructive behavior, quit doing things I enjoyed, slept way too much, ate horribly, put myself in seclusion, head aches, feeling lonely, etc.... it really went on much more than that.
Speak to your doctor. Help is available.