Too much is not enough

It's pretty widely known that I like to sleep - a lot. I can go without much sleep for a couple of days, but I will need to catch up at some point. But usually, once I catch up, I'm ok. Well, that's not the case the last couple of days. I'm tired. I can't focus. I can't stop yawning. I even put my head down on my desk today! It's not like I'm going to bed late, but apparently it's still not early enough. So no calling our house after 7 pm!