This is the most terrible thing, I can't imagine how you must feel. Thank you for sharing something so personal with us, I hope in some small way we can help. Neil Peart (The drummer from Rush), lost his wife and daughter within a year of each other, he took off on a 55,000 mile motorbike ride and wrote a book about his experience, rebuilding his life on the journey....its called Ghost Rider, i've been meaning to read it myself.....It may be worth a read?
Best wishes for the future
Roger