Maybe you're having too much coffee. What's your sleeping schedule normally?

Go to bed around midnight and wake up at 11am.
Tonight I went to bed at 11pm since I gotta get up at 8am.

And I had coffee at 2 and 4. x.x
And despite what my username is.
I don't drink it as often most think as it messes up my stomach. XP
Even though I love Coffee ;w;

Maybe you should cut it out of your routine for a couple days. Also, no computing or gaming before bed - no bright screens. See if that helps. :)

This is a little late, but because sickness.

Lay in bed for a bit before needing to fall asleep. If you don't spend much time in bed outside of sleeping, your body will associate it with sleep and will be more likely to fall asleep when you lay down for a while. I've found this has helped me even when I am too awake to sleep.