Not as Excited as I should be!

I don't know if it's holiday depression or. I'm just not feelin' it! I'm doing all the holiday stuff - baking, wrapping, decorating. But by now I should be in a happy frenzy, excited for Saturday to get here (we celebrate Christmas Eve!). But instead I just sit and don't know what to do next. I'm just sad and I don't know why. I'll sure it will lift and I'll feel better when Saturday gets here. I certainly hope so! It takes a lot of energy to pretend you're excited when you're not!