I don't know what to do

Recently so much has happened in my life. Right now I'm visiting my family for vacation. Yesterday my family and I were all in the swimming pool except for my grandpa and my grandma. We were having fun until my mum suddenly wanted to leave. I didn't understand why she was so impatient. I later got told that my grandpa vomited blood and collapsed. We got home and saw my grandpa being transported in the hospital. Everyone cried at the sight of him inconscious, they were praying (my family is very religious). I didn't know what to do or how to react. I was close to him when I was little. But I guess I kind of distanced myself with time. He's still inconscious today and I wonder how to help my mum feel better and help her. I'm very scared because my grandpa already got through cancer.