I go through it all the time, but i usually become self aware when it is happening
depression in my understanding is a level of low vibration. It can drive you to suicide, if you are not strong enough to fight, So for some of us it's a daily battle going on within us.
Once I was able to become aware of what I was feeling and why I was feeling that way, I was able to make some adjustment. I believe in myself, as all of you should believe in yourself. I don't allow depression to defeat me, because i'm stronger than it.
I am glad you found something to do that works. It's a tough battle.
I live for the challenge