Welcome alex! Yeah, I saw you when you joined yesterday, but missed you in chat.
That is depression... lingers.... plus, at your age, your body is changing SO much SO fast, you're reeling! ''
Have you tried talking with your school counselor? That way you have someone who can assess whether your depression needs more than talk, but medication too... (not forever, just to rebalance your system.)
Make sure, in the interim of deciding what else to do (coming to psychcentral was a good decision) that you are engaged in some activity. Exercise is good for combating depression: shoot hoops or something. And find a hobby or join an organization or even volunteer for a local organization or hospital! Boredom feeds depression, don't let it add to yours, ok?
Come back and post often!