My grandmother passed away around three years ago at this point. When she passed, she had developed dementia that basically affected her ability to remember members of my family's names, and could no longer walk as a result of a herniated hip.
About a week before she passed, she slipped into a coma in her sleep while her nurse was caring for her (she lived in a nursing home). It was basically at this point that we called in hospice care, who were basically given the task of caring for my grandma as best as they could to make her final few days as comfortable and palliative as possible. In my eyes, they're saints.
I remember the morning she died pretty much as if it were yesterday. The light in my room was kind of gray, and my mom walked in and woke me up before telling me that my grandmother hadn't been doing well and that she was going to go check on her. As soon as she left, I cried like I had never cried before. I knew my grandma had passed and I hadn't gotten to say goodbye, but I cried because I remembered the good times when she could still walk, and when she and my grandpa would take care of me when I was little and my mom was at work.
I don't mean to garner sympathy, but I just want to impart the fact that you should remember the good times you spent with your grandmother. Don't dwell on her death, because it's not what she would want. She would want you to hearken back to your best memories of her, because those are the memories that'll always be with you.
I'm really sorry for your loss.