I had to come back because I need your help....????

Last night I had a lucid dream. Basically a space ship came, hoovered above my mom's house in the back and then went to the front and landed in the street. I ran downstairs with my uncle and saw what I thought was an alien at the time get out the ship. My sister and niece were sitting in the living room and we tried to get them to come upstairs with us but it was like they couldn't see us. They didn't react to the alien or to us. So my uncle ran back upstairs and after I realized I couldn't get my sister and niece to come I ran upstairs too. I looked for him upstairs a little, couldn't find him and sensed the alien was getting closer. I'm in my mom's office and I see the alien coming through the door. Now at this time I can't make out a face of the alien but could only see a purple glow. I raise the window and kicked out the screen, jumped on the roof, ran and somehow ended up on the neighbors roof. Sensing something I stop to look back and I see a woman in the window smiling. She looks just like my grandmother and when I heard her talk, she even sounds like her. My grandma passed away back in 2004 and I can't recall having dreamed about her before. I say to her, "goodmama" then she says "no child goodmama is long gone". She said it with a smile on her face and in a friendly and loving tone. Then I ask her "who are you" and she says "I had to come back because I need your help." Then my fan starts making sounds and I wake up before I could ask more questions.

When I first saw the ship and ran I was scared but when I stopped and looked back to talk to the woman I wasn't scared and felt a sense of comfort. I've been thinking about what this could mean all day.