Holy cow man... I am so incredibly sorry. Losing a family member is incredibly hard, especially for when you have a soft spot for your grandparents :(
Unfortunately, life sucks in that way. Losing people REALLY sucks.
I seriously hope you're doing okay, but I also hope you know that you're going to get through this, and she has gone to see the face of God.
Sending much love and prayers your way.
<3