i have same feeling, i still have depression, it started from silly things that recently happened in my life but its not for me.
sometimes i ask myself who am i?
why am i so depressed its not important thing to be depressed for?
why i feel so stuck and suffocating?
and taking decisions makes me really scared especially if i didn't know where they will lead me. another big problem i can recall event i didnt like dozens of times that i feel i will bury myself.
i think everything i am thinking about and happening to me now makes me feel confused!
i used to cope with that feeling by writing songs or parts from the story i am working on now, sometimes i try to pretend to be stable person, it doesnt work all the time but better than nothing, school and studying also helps me because it makes me stop thinking for longer time.