I lost my mum. Really fast to cancer. She promised that if she could ,she would come back to talk to me .I so badly want her to talk with her .

You don't really talk together, like in person. You settle into grief and sweet thoughts, and open your mind, and think about her as though she is there, and talk to her out loud as you go about your day, and you will get a sense of what she would have said to you, what she might be saying to you. It takes time. Just wait. It might not be what you expect, like a living person walking in the door, more like arriving in your thoughts.