You might be in hibernation at this point. It's not all that surprising, it's cold, you get the flu, you're tired all the time, you feel that bears might have the right idea. Especially when you don't have a project you need to accomplish that very day, every day.
But muscles do get saggy when you don't work out, so does your creative muscles. Come on chop-chop! up to it, or at least think about it. Although for now, the game is on.