Hey man, I'm sorry for your loss.
My Grandad died this morning, at about 5 o'clock. I really broke down, but I found that doing something normal, like playing on the xbox, watching television, or doing some work really helped. It seems like I should feel bad, as if I'm insulting his memory if I don't spend the whole day talking about him, but that wouldn't help anyway.
Just see if you can get some normality back, no matter how trivial it seems.
And I don't mean to be that guy that tops everyone else's situations, I just want to provide some advice and help if you need it