Dream of screaming

In the dream I wake up and I look over to see my grandma sleeping. It's dark and eery. And then I go over and she isn't moving. She's not breathing and her oxygen mask is offset on her face. I start to try and wake her up. I'm shaking her and crying and screaming, "Grandma, Wake up!" And suddenly she wakes up and she says "It's your fault! Why didn't you wake me sooner!" And then it's over