I just read this today as well, and am so sorry, Dinah. Everything I would say in response has already been said by others here, but please know we are here for you. I absolutely cannot imagine what you, your daughter, your son-in-law, and the rest of the family are going through. It's no wonder you're feeling a huge variety of emotions - a beautiful wonderful happy day turned tragic, and there is no reason to apologize for what you are feeling.
PS - your daughter is beautiful.