Lazy, tired and demotivated

The exams are just around the corner, in fact korkor's mid year exam is already here, but the sense of kancheong is nowhere to be felt. Prepared, you ask? Far from it, I believe. But I have no motivation or urge to push them to the core to study for it. Tell me why.

I just want to lie back and sleep. I just want to dig stories of current issues to find a ray of hope. I don't feel like cooking. I don't want to do my groceries shopping, though some stock is running low. I feel so awful lazy and tired. During the afternoons, my eyelids are soooo heavy but I can't sleep, dammit. But I find it so difficult to start tutoring the kids. Come night time, I just urge the kids to kaotim their homework and off to bed as soon as they can . Then I start playing Candy Crush till my eyes can't open anymore, and only then be going to sleep but that would be left 4-5 hours before the alarm rings. 

Grr! What is wrong??