The Secret (2007)

This movie is a remake of a Japanese movie. Hannah and Benjamin Marris (Lili Taylor & David Duchovny) are happily married with a teen-age daughter,Samantha. (Olivia Thirlby) Unfortunately, during an argument in the car, Samantha and Hannah are in a car accident. At the hospital, Hannah awakens to find herself in her daughter's body with no idea why she is there. He body is dead but she is not. Hannah realizes she has to figure out a way to convince her husband who she really is, along with having to live her daughter's life. Will she be able to re-emerge or will she be trapped inside another's body forever?