Membrane sweep does it work?

Sam
Hey guys, I had my first membrane sweep today 5pm. Doctor said I was already 3cm dilated! Baby is weighing 9.7lbs (omg) I'm 39 weeks. Has anyone else had the sweep? Did it make anyone go into labour and if so after how long? I'm getting really bad cramping in my lower back going to the front of my abdomen. I hope I can get a good night's sleep and stretch it out till tomorrow afternoon! Xx