In this passage, as Rachel realizes that Megan is dead, her nightmares coincide with reality. Rachel is terrified by things she doesn’t even remember. She is unsure of what her role in all this truly is, yet as the stakes grow higher and higher, she worries that any involvement she may have had some involvement in Megan’s death. Just as Hawkins is readers to second-guess Rachel, Rachel’s circumstances lead her to distrust herself.