I'm afraid if we ignore grandmother in pain, we will get accused of neglect. What can we do?

I live with my grandmother, she recently fell very hard on the floor. She is bruised and refuses to go to the hospital. She has trouble breathing and refuses to leave the house at all. We do any errands for her. She will not go to the hospital but I can tell she is in bad pain. My mom has POA but my grandma says she doesn't care what we do, she will not go to the hospital. I'm afraid that if we ignore the fact she is in pain, we will get accused of neglect. Im more afraid that there is something more that is wrong with her. She is paranoid. Believes people want to kill her that is why she won't leave the house. We've been dealing with that but now she is hurt. I currently live with her but start college next week. I don't know what to do. She is 54 years old.