It is difficult, trust and know you did all you could , we cannot know the future only the moment we are in. I lost my 55 year old husband suddenly and there was no explanation. He was put into medical coma and never woke up. So, difficult but, I made the decisions he expressed before the event happened and made peace with the knowledge I did what I knew was right in the moments. I am certain you did as well. May peace rest in your soul and calm your heart. It takes time.