If the dr did the sweep right, there should be some bloody goop. At least there always was for me when i had it done. They're basically separating your amniotic sac from the lining of your uterus to stir things up. Unfortunately I never got much more than a tiny bit of spotting and some cramping the first day. I had it done several times at the ends of each of my pregnancies and it never once put me into labor.