Brittany Murphy's husband and mother made a frantic attempt to revive her before paramedics arrived ... this according to notes written by an investigator from the L.A. County Coroner's office. And, there were a shocking number of strong prescription meds on Brittany's nightstand. TMZ has reviewed the documents, written by Investigator Blacklock. According to his notes, Brittany Murphy "had been complaining of shortness of breath and severe abdominal pain" for 7 to 10 days prior to her death. According to the notes, Murphy went into the bathroom at around 7:30 AM Sunday and shut the door. A half hour later...