Oh it's ok to have a mini freak out OP 
Everyone has different ways of dealing with truly awful things that happen. There's no one view on how to do it.
My view is that other worse things don't invalidate the everyday details that make up people's lives. Otherwise no one would be able to say anything to me as they'd be too busy tiptoeing around my tragedy and pain.
And that happens, usually before they never contact me again because they feel awkward.
I hate it when people have to check themselves and say 'but oh dear, I shouldn't be saying this to you...' as they stop themselves embarking on a thoroughly normal daily moan about bin men or queues.
It puts a big gap between me and the rest of the world, like I'm no longer allowed to exist in the same way others do. When your life is filled with awfulness somehow people think you don't care about their daily lives and I find that so sad and so other-ing
. When your tragedy goes on and on you can't wait for it to end and for people to include you again as one of them. That's what I find, anyway.
I am going to have a hideous Christmas and I can't hold it together to keep it from being ruined for DS, and I'm terribly upset about that. But I also know that sudden sinking feeling when it all goes a bit f*cked up with wrapping or accidental peeking etc... and you need to vent, and make it all ok again.
Have a lovely Christmas
(& have a good cover up story ready if your 4 yr old asks).