WonderLand (Not inspired of the classic tail)

Rilea is a normal human girl, living in the human realm. Her mother, younger sister, and her older sister are the main people in her life.
On a pretty normal morning, while heading into school, something happens to Rilea, causing her to wake up in the hospital. She swears on her life that a dragonish creature had done something to her, but everyone brushes it off as a side-effect. Two months later, her older sister, Elvira, tells her the truth on her 18th birthday, about their father, where she's been, and literately changes her world.