I had a membrane sweep a week before my bubs due date, as I had really bad braxton hicks. They started 2 weeks before her due date and I had them every hour for 2 weeks straight.
The membrane sweep hurt, but a tickle hurt. I didn't like it but if it was going to help bring bub on, I would've done anything. I tried all the old wives tales. Driving on bumpy roads, eating fresh pineapples, sex, walking, warm baths, raspberry tea. The only thing I didn't do was the castor oil thing as that can be dangerous.
Don't really know if the membrane sweep helped or not in my case, but I have heard of other women who had it and then went into labour. But then babies come when they're good and ready.
Good luck with everything.
Lisa, SA, baby girl (4.5.03)