I think I heard somewhere that it's possible to have too much sleep, to an extent where, like... You've slept so much you go back to being tired. Maybe that's what happened?

Coloring is hard for me too, actually. ಠ_ಠ I always think my pencil sketches have so much more character than anything I try to color; coloring always turns my stuff to crap. So as a result, I never try. XD; It's a bad cycle.