What is the name of this horror flick?

Its a few years old-its about a girl who works in a convenience store-it is very creepy...but it turns out at the end that she has to live the day she is murdered over and over.I remember a scene she is being chased through a field by the killer-he stuffs her in a truck toolbox. Then at the end they show her working at the convenience store again-to start it all over again. I know these aren't the best clues-but there is someone out there who knows what I am talking about-I hope.I think she is murdered in the cellar of her house.