I have the same feeling as you. I, sometimes feel like I died that day too . I try to move on, I have dreamed about John but he doesn't talk.
May seen dumb, but his dog is missing, John. She is jumping on the other dogs and fighting with them. The Vet said there world is turned upside down and it may take mounths. She always went on the truck with him and really loved John. Dogs do sence things. I think the dogs help me sometimes.
I keep telling my self someday it will be better. But some days it hits so many times!