I am so very sorry. I know exactly how you feel. I just lost my grandma to Breast Cancer in March. I was with her in the morning having breakfast at the nursing home, to find out that was the last time I would have a conversation with her. In the matter of a few hours she went from great to passing. I miss her everyday. We didnt get a chance to get Hospice, it happened so fast.
My thoughts and prayers are with you and your family.
PM me if you wanna talk