Dream About Zombie Apocalypse And Cathrine

I had a dream I was this old fat dude and apparently there was a zombie forever ago and he had a wife named Cathrine, it was my job to investigate how they all died even though we new it was all from the zombie apocalypse, when it went in back stories I was the guy but when I was talking to him I was me, he lost all this arms and legs but hand some now, Catherine had lost one leg, along with all the other friends but there was a family member that had lost only an arm, when I was done with my investigation I had to make a little thing with all the pictures and how they all died with evidence which weirdly gave my English assignment vibes, but instead of doing it all on a paper I just made a cake for Cathrine's memory and put pictures of them together and the friends, there was also pictures of this little girl, all I remember of her is that she was weird and liked creepy things and mushrooms, she had a creepy doll with long blonde hair and deep blue eyes, and a dress covered in dirt with leaves in her hair, I was gathering photos in the past and took a picture of her, one of the guys asked why I was taking a photo of it and I said "I might miss the creepy doll, okay!!!" Cause apparently we were leaving some where. In the beginning they have 3 children and eldest daughter middle daughter and youngest son, they all died, what I was apparently investigating was who gave it to Cathrine, we knew so far that it was her youngest daughter who gave it to the rest of the kids, but we thought it was an old creepy guy who gave it to the daughter cause they were weirdly close one time, but instead, they had bought her a dolphin toy and it ended up having the virus that carried it to the little girl and turned her, while I was making the cake I was singing vampire empire, but like consciously singing it, not the dream making me do it, and I was singing it as I woke up. I also remember it very vividly ma scan describe exactly what everyone and thing looked like down to every little detail.