Sounds like a beginning of a depression - you should talk to your doctor about how you are feeling- stress and everything.
About Christmas spirit - I started hating Christmas when I was a teenager (31 now) and it was mainly because it became "to much of everything -everywhere". People trying to sell Christmas makes me sick - that is not what it is about.
I got 2 kids and we got a tiny bit of decorations for their sake. And yes later we will get a tree to put lights on , and we are going to see family and friends for Christmas and it will be fine. But no, no spirit more like a feeling of Christmas suffocation here..