I am so very sorry for your loss of your husband and also for being there on your own 💔🙏 The same thing happened to my mother (a cancer patient) who passed suddenly at home in the early hours. She was due to go into hospital that morning to be rehydrated. My dad was the only one there. The paramedics had already arrived by the time my sister (a nurse) and I arrived but mom had passed before they arrived. My sister has convinced us that mom had no consciousness of what was happening. My poor father was traumatised for years. He needed to speak about it. It was hard to listen to the details each time, but he needed to share them and we needed to help carry them and to reassure him mom wasn’t aware. .