Be Not Far from Me by Mindy McGinnis

A high school student named Ashley Hawkins must fight to stay alive in the Great Smoky Mountains after suffering a traumatic injury and being left behind by her friends. 

This book contains: alcohol, animal cruelty (necessity), body horror, bullying, controversial cultural gender and social commentary, death, deception, depression, derogatory terms, drugs, gore, non-sexual nudity, parental neglect, profanity, sexual activities (not explicit), suicide ideation and violence.