B.D. is а 29-yeаr-оld G3P2002 with а histоry оf two previous normal pregnancies and births, with newborns weighing 7 ½ lb and 8 lbs. After a 10 hour first stage and a 25 minute second stage, she delivers her placenta after 10 minutes. A minute later you observe bright red, brisk bleeding from the vagina. What is your first action?