The Falling (2015)

In 1969, Lydia and Abbie are best friends at an English girls school. After a tragedy occurs at the school, a mysterious fainting epidemic breaks out threatening the stability of all involved. Lydia, the neglected daughter of an agoraphobic, becomes fixated on Abbie, who has begun to explore her sexuality. When Lydia suffers from a fainting spell, it becomes an epidemic, and she must convince the administration to take action.