Oh no! Overslept!

The hands of the clock continued to tick roun steadily as I slept in the now empty corridor. The fire in the grate flickered and went out and the oil lamp that was on the desk flickered and dimmed down until it was nothing but a soft glow and the wick was nothing more than a stub of its former glory. The stars outside in the sky started to fade as an unknown artist painted different coloured streaks on the dark blue canvas. The top of the sun peeked over the horizon and eventually made its way up into the sky.

Alarm clocks sounded in each dormitory and the Ravenclaws started to wake up and get ready for their school day. No one in the first year girls dormitory noticed the extra absence of one of their number. I was still asleep at the table in the commonroom.

The boys and girls of varying ages trooped down the stairs and filed out of the ravenclaw tower and down the staircase to the great hall as I slept, no one noticing the little first year slumped in a heavy sleep.

The day passed and people came and went, grabbing books from their bedside lockers or doing homework, and no one saw the girl in the corner.

I didn't wake up until noon, and by that time, I had missed all of Friday's lessons. I jolted awake, spilling my ink bottle onto the table and all over my homework. With a cry of despair, I picked it up and dried to clean up the mess and salvage my homework. My potions essay was ruined and my Defence Against the Dark Arts work was nothing more than a great big splodge of blue ink spreading across my thin, spikey writing.

I slumped down on the chair and hung my head in my hands.
"Why does this always happen to me?" I asked myself. "First I sleep through the whole of my school day, then I ruin my homework by pouring ink on it. Why, why, why?!"

I picked up my charms textbook and flicked through it, trying to find a spell that would clean my work up. To my sheer delight, there was a spell that would clean up the mess. I studied the incantation quickly and checked the wand movement.
My robe had fallen to the floor and the handle of the wand could be seen peeping out of the wand pocket. Grabbing it excitedly, I pointed it at my homework.
"Evanesco," I said, flicking my wand. As if I was using some sort of vacuum cleaner, all the spilt ink was sucked up from the parchment and into my wand. I then pointed it at the ink that was still on the table and the same thing happened. Deftly, I picked up the pot of ink and the wand deposited all of the ink. I sighed with relief and closed the pot and latched it firmly.
I scooped up all the pieces of parchment and shoved them into my bag, along with my textbook and box of quills.

I took my bag upstairs to my dormitory and stowed it away in my locker by my bed. As I stood up again, I was overcome not by a giddy headrush but by a feeling of heavy drowsiness. Without another motion or coherent thought, I fell onto my bed and slept again.
My last thought before sinking into the deep sleep was what is happening to me?