So sorry for you loss. Similar incident happened to my dad in that he complained of horrible pain in his back and they did nothing. As a diabetic with a history of heart problems they did not recognize the signs of a heart attack and he was in ICU! We told the doctor and pointed out many of the mistakes and he said, " if mistakes were made I am sorry." Please know that you DH is still with you. I do not believe that just because we shed our earthly body that we leave the ones we love. Talk to him. He will hear you.