Sorry to hear about your low mood. We know how you feel. Been there, done that, got the T-Shirt, as they say. GIMA makes a good suggestion...see if you can immerse yourself in something. Or you can just go through the mood and come out on the other side knowing that this is ANOTHER challenging holiday you have faced and that you are still standing.
I am off to the movies this evening but I'll check in with you later.