I think the movie is in the POV of a girl who dies everyday. She tries to prevent her death but she always dies. I think she is killed by the same man but we as the viewer can never see his face. Movie ends and we find out the girl is actually the killer stck in his victims body in a type of purgatory. Help!!

Hmmm.. possibly this?
Triangle (2009) - IMDb (http://www.imdb.com/title/tt1187064/)

Sounds like Salvage (http://www.imdb.com/title/tt0492754/)