So sorry, Roseweb.
I don't think it makes any difference whether it is expected or not. It's just terribly hard to grasp that one moment someone who has been there all your life is suddenly gone and it hurts more than anything has ever hurt before.
Just do whatever helps for the moment and try to remember to eat and drink enough. It's easy to forget when you are hit by a shock like this, but it won't help not to. You'll only feel worse.
Keep talking to us as and when you want to. You will find a lot of support here. We are all here because we have lost someone, so understand what you are going though.
Sending strength and hugs..xx