Is it still reality ?

Lena-Rose Sefrey is a 15-year old teenage girl who lives with her 18-year old brother and her mother in the Southern of England.
Her life has been differently since her dad had died in a job accident.
She is just trying to distract herself from reality with drawing and reading but one day everything changes even more as it already had.
It all starts with dreams or rather nightmares, but there's nothing wrong about it, every person eventually has one, it's human. Nevertheless her family gets more and more worried.
But there's something odd about these dreams , they become real to Lena, she gets real memories and even starts to disappear.
She notices that there's clearly something wrong, but why especially with her?
Is this maybe another world or something in between? Is this still the reality she is familiar with? Does she get attracted to something or maybe someone?
Read to find out!