My elderly Mother is hearing my voice call out to her for help at night after she has gone to bed. I told it's not true now she's angry at me. What do I do?

My mom too. I don't think it really matters if it is true or not, it is her experience, and that is true. I asked my mom if she could respond to the voice. Somehow after that conversation the voice is still there but not scary any more. I think accepting and facing it dissolves some of the fear about it. It becomes something you are working with not something being done to you.