This dream reflects your deep feelings of concern and fear regarding your mother's health, especially given the context of her being in the hospital. Dreams about loved ones, particularly in distressing situations, often manifest our subconscious worries and emotions.
Your mother's reassurance in the dream suggests a desire for comfort and hope in a difficult time. Her statements about being on Earth or in heaven may symbolize your struggle with the concept of life and death, as well as your wish for her to stay with you. The imagery of being "in ashes" can signify feelings of loss and the permanence of death, which can be particularly hard to confront.
Crying and curling up into a ball at the end of the dream indicates a need to express your sadness and vulnerability. This is a natural response to the situation you are experiencing and shows that you are processing your emotions.
Overall, this dream highlights your love for your mother, your fear of losing her, and your longing for connection and support during a challenging time. It may be helpful to talk about your feelings with someone close to you or find ways to connect with your mother, even if it's through phone calls or messages, as it can provide you with comfort and strengthen your bond.