Little Red Gem
When Ruby Parker dies in a car crash and returns to her home town as a ghost, her half-sister Audrey uses magic to prove she's dead. Ruby decides that if magic can cross the realms, she'll use magic to be with her boyfriend Leo, because she died before she could tell him she was pregnant and she needs to know if he would have stuck around or left her to raise a child on her own, the way her dad had run out on her mom. But there's a catch, she can only inhabit a living person, so she tricks Audrey into swapping bodies.
Convinced Leo will know it's her and not Audrey, when she reveals her identity, Leo thinks it's a horrible joke and rejects her. Now, wondering if they were ever soul mates, Ruby returns to the afterlife to spend eternity with the other ghosts who haunt the cabin in the woods. One of the ghosts feels sorry for her and gives her a watch that possesses magic and will grant one wish. But if magic got her into trouble, how can it get her out of it? And if it does work, and she can wish to do her time over, how far back should she go?