Just cry, have a little break-down. No-matter what you say, you can afford it. Even if it's just for a couple of hours, go find a place where you can be on your own, even if it takes up the time you would have (normally) slept it. Punch some walls, scream you lungs out, cry until your blind, and blame the world on shit you're feeling.
If you don't let it up, you'll have a worse breakdown at a time that is out of your control. It's pretty much like putting off a hospital appointment in that respect; leaving longer isn't going to make what's ailing you go away, it'll just come back at a time that is out of your hands.
What you need now, after such a grievous loss, is to take control of something - even if it's just when to break down.
I'm sorry for your loss, and if you need to talk at all then feel free to send me a Personal Message too. Now go off and cry, you idiot, and get it out!