This isn't about an OP bashing. It's about OP getting some perspective...
I'm absolutely Christmas crazy. And this year I'm pregnant with twins due on Christmas Day. I can't plan anything. I'm trying to do too much to prepare in advance and knackering myself. I'm still hosting for 6 (that's the plan) although for all I know I'll be spending Christmas Day shrieking pushing out two kids 
DS11 has severe ADHD and can make Christmas more complex/difficult than I'd like so we have that to "contend" with too, although we're used to it.
So, I could go all, "Christmas is over this year. I'll be in labour, DS will be in tears on Christmas Day without his parents while I give birth. My parents and grandparents won't have anywhere to go as they're due here. DH is fretting about what will happen. The Christmas dinner will probably sit raw on the side as I rush off to hospital".
My point is, we'll still have our tree up even if it's only half done, we'll still put the Christmas films on and we'll make the most of it! If I go into labour, DS will stay with the other adults and open his presents, and fuck it, the raw turkey can sit and go off on the side and we'll end up sending them a takeaway! It's far from ideal as the Christmas we know and love, but you can either instill a damp negative spin on the situation, or say, you know what, this is what the situation is this year, and what's preventing us from having a perfectly enjoyable time if we actually just get on with it with the right attitude. Actually? Nothing.