I'm terribly sorry for your loss, TSC.
This is very sad news indeed.
My hope is that you'll allow yourself to grieve fully and then eventually heal. Please try to take good care of yourself along the way and don't hesitate to ask for help from those that care. I'm certain that your husband would want that. And, I'm certain that your friends and family would welcome the chance to help you through this devastating time.
That is what I tell my wife ... in the event of my passing ... please take the best possible care of yourself and (when you're ready) live life to it's fullest. Never give up.
I wish you and all yours all the best.