Deranged

Joyce seems to have the perfect life - she lives in a nice apartment with a wealthy husband, is soon going to give birth to a baby boy, and has all the money she'll ever need. But while her husband is away usiness, Joyce is attacked by a masked intruder that unleashes within her a frightened little girl and a crazed madwoman who is hungry for revenge. Joyce's wild hallucinations take over, and she begins to murder anyone and everyone who comes near her. (imdb)