Ah, the dark night of the soul... I've been there. All the advice I can give you is that it's supposed to feel that way. The worry about the future, the lack of motivation, lack of interest in school, the excessive sleep... but I think it's all supposed to teach you something.
It does get better, though. At least usually, I suppose. For me, it started changing when I just gave in to it and tried to see what it was all about. I would just lie down, like you said, in bed and think about how much life sucks or whatever was in my head, for a long time. I didn't end up killing myself, obviously, but after some time I think I "got it all out" -- even if I didn't understand it all -- and eventually realized that days were passing by... and I was still alive and in one piece, free to choose, and that I might as well make a go at my life, with whatever steps I could take.
It was a slow and gradual process taking many months for me, but I started seeing a counselor, started reading Steve's articles, started meditating, started taking care of my health, and eventually (I think this was one of the MAIN things) I started choosing to openly do the things I was REALLY interested in, such as taking classes I was interested in taking from the heart.
Now I'm growing, I'm learning, ιand it's kind of exciting -- so, expect to get better, I think you're on the right track.