Sweeping membranes?????

Chelsea

I’ve looked online and it tells a brief description of what that means. But I’m still kind of uncertain about what it is exactly? And what does it feel like? How long after that could I go into labor? Does it hurt?

Someone please help me understand this. I am 39w + 3d, and I have a check up tomorrow with my OB/GYN. I wanna be prepared when I walk in on if I want this done or not. And if it’s something I have to ask about before hand?

Help!:)