Please accept my deepest condolences as I am going thru the same thing where I think everyday what if I didn't take her to doctor that day but one day my daughter told me that if not that day it could happen on another day and then you will think why I cancelled the first one. It is a great forum as we are able to connect with everyone who is going thru the similar journey. Check out the link below and you will see in the last one girl lost her husband of 10 days on honeymoon.
http://www.myspouseisdead.com/2008/07/grieving-sudden-death.html?showComment=1470886645558#c6163165533101934990
I am hoping god will give us strength.