Sorry to hear that.

My grandpa died almost 2 weeks ago, so I can relate. It's a very tough thing to deal with.

My best advice is be there for your grandma, ok? My grandma was so upset when her husband passed, constantly having crying spells. We don't know what would've happened to her if we weren't there to support her. She kept saying things like, "I want God to take me with him." So, it's very important to be with her. We had my grandma stay with us for almost 2 weeks. It helped her immensely.