It's been A WEEK and a half now

It's been A WEEK and a half Now
a post on my mood swings

I don't know how you can classify it but i had a very low mood for a week and a half now. half a week to go, and I'm hitting clinical depression. I have a test this coming Monday on Physical Chemistry and i can't concentrate. My mind seems like in a trance state, immobile, and i always sleep a lot. I sleep from 9PM to 3AM last Thursday, and another 6 hours in the afternoon. i don't know what's gonna happen to me. i have the peak of sadness at around twelve noon, and in the afternoon, i feel my world is gonna fall down on me. :(