We were to go to PILS for christmas day, boxing day at home with DP, DC, BIL and SiL. Boxing day we have organised between is, no fuss.
But, we are now no longer invited to PIL's for christmas day. It's a long story. We / they don't do the whole Big Christmas thing but we have to do something. My family can't be with us, I need the distraction TBH.
So, yes, I am stressed. Do not know if I need to cater just for us or for BIL and SIL (or just one of them, or neither of them). Have nothing planned and christmas do's at school and playschool today too.
DP is furious that I'm stressed. AIBU (surely not?) to be stressed? 
Don't know where the hell to start
Not in the UK so running in to M&S or whereever and grabbing some crappy pre-prepped stuff isn't possible.