Membranes stripped

Amanda
Anyone ever or have you gotten your membranes stripped? This is my third baby so I decided to do it, I'm 38 weeks and had it done yesterday. Had some minor bleeding and very little cramping. In the middle of the night had some contractions but nothing else has occurred. Have I past my window to it being effective? My doctor said it could take 3 days to work but I thought I read it usually takes within 24 hours, what has been your experience?