Sorry for your loss.

Usually you will need some kind of ritual to root you back in reality and make you realize what's really going on. In my case it was downing the casket into the grave. That's when "the penny dropped" and the things started to feel real again. With my aunt, i couldn't go to the funeral, so the penny only dropped a week later when we got the family together for the requiem mass.

Then there's the pain. The pain never subsides, you just learn to bear it.