I'm desperate with anxiety and sadness

Good morning. I don't know who else to talk to. My sister passed away with cancer less than a year ago. She was 51. 3 months later my aunt passed away suddenly to cancer and now my oldest and closest friend in the whole world is in the end stages, she is 44. I can't cope with it all. I want to see her & have asked to see her but her husband and sister haven't said if I can. I guess with Covid its not so straight forward. She has come home and is in a hospital bed. I just messaged her sister who said on Saturday she slept most of the day but did awake to have a bit of conversation but yesterday she slept all day. I'm out of my mind with grief and sadness because I knw what this means as I was with my sister when she died. I feel so helpless with what to do.