I am sooo terribly sorry for you and your family's loss.
Do you have someone to say with you,while your DH is away?
And honestly, and this might just be my opinion on it - but don't hold in all of your emotions. I think trying to remain calm is key - but you don't want to stress out your body in not feeling the emotions you need to during this horrible time.
Please let us know if there is anything that you need