The sleeping pattern is totally recognizable for me (it seems like I'm following your footsteps exactly! Except for the falling down the stairs thing.) It's good you don't have anything else. Try to get your rest, even if it's at a weird time.
Also the lack of motivation *raises hand* yeah here too. I had all these plans about studying for school, making assignments....none of it has been done. I'm either too tired and when I'm not my mind immediately thinks of other things I'd rather do. This is unlike me. I'm pretty disciplined when it comes to school...except during this fast.
Just keep on going. If you beat this and make it you can beat it all! (Okay, lame sentence, but it's still pretty good considering my brain is beat up ;) )
Stay strong in the struggle girl! And become pure as a newborn baby!