I think the movie you are looking for is one named The Witch, sometimes it is also named Superstition. Here is a web page I found about the film and you can see if it fits the one you where looking for.
http://www.imdb.com/title/tt0084739/
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@}->-If you are ever attacked by vampires, held hostage by aliens, haunted by angry ghosts, put on a zombie's menu, stalked by an undying killer or in other ways find yourself in a horror movie situation, never, ever go near the bathroom!-<-{@
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