Room 6 (2006) on Netflix

The school teacher Amy has been proposed by her boyfriend Nick early in the morning and she promises her answer later in the afternoon. After her class, while coming back home, Nick has a car accident in a crossroad with a truck driven by Lucas Dylan. He breaks his leg and an ambulance takes him to the hospital. Amy has a phobia about hospitals, but she gets a taxi and goes to the nearest hospital. However, Nick is not there, and she meets Lucas, who is also looking for his sister that has disappeared in the same weird circumstance. They decide to team up and search together where the victims might have been interned, while Amy experiences the most bizarre and scary situations.