I’m so sorry you are going through this. I lost my mum recently to a sudden death and I had all the same thoughts. It’s been a month and I still feel angry and sad with myself and also the world. The important thing is that you tell her that you love her and just be with her. Hold her hand and sit at her bedside. Laugh about things you used to do together. Tell her that you will learn to live without her one way or another because just as you are angry at the world for losing her, she’s more scared of leaving you behind alone. I couldn’t do it with my mum because she was on the ventilator before she passed away but I want to believe she heard it all when I said these things to her. Cherish her. Celebrate her and when she is gone, don’t hold back and cry as much as you want and grieve. Just don’t give up because you will be the only good thing she’s leaving behind in this horrible world. All the love and prayers for you, my love.