exhausted

I am exhausted. I dunno what's up with my body/mind.. or is it the weather?
I tend to laze on my bed till around 9am everyday before getting up.
This is not good, esp when I have a class at 10 a.m.
The sun doesn't shine till around 9am, that's why I love sleeping in coz it's so dark and cosy.

By the time I walk to lecture, I get so tired I start to yawn.
Goodness me!!

When the sun sets around 4pm, I get really hungry.
Most of the time, I'll still be in lecture so I can only feel my tummy growling for food, and I have to wait till 5/6pm before I get to eat.

I am tired as I'm typing this~ and I've still got work waiting for me to do.
How? How? How??