Willa-
I'm so sorry for your loss. If you don't find me too insensitive for saying so, it's almost funny, being killed by a McFlurry. I have a child with reactive hypoglycemia and I understand the difficulty of managing blood sugar.
My Dad died of a blood clot after flying to Hong Kong in 2000. He fell down on the escalator at the airport and that was that. I like to think of it as the "stairway to Heaven". Since he was a German citizen, it took some doing to get through the red tape to bring him home to the US for burial. When we finally saw him in the casket, my sisters and I were laughing as we cried. He was embalmed in Hong Kong, and had a distinctly Asian cast to his features that had never been evident in life!
