So very tired. So very, very tired

You know when you're so tired that everything you do feels like it's in a fog?
Yeah, that.
I was able to take an hour-long nap this afternoon, and it didn't even scratch the surface on my tiredness. My head's all swimmy right now, and I can feel my body gravitate to the bed, imploring my head to lay down "just for a couple minutes." It's like a super tired episode of Just the Tip.
I'm calling it: Time of sleeping, 10:30 p.m.