Exciting! I am 39+3, had a membrane sweep yesterday morning and a bloody show this morning. At around 6:30pm I started getting extreme lower back cramps that have barely gone away. Then at both 7:20pm and 9:30pm I had episodes of about 5 minutes each of the most extreme cramps I have ever experienced, with at least one tightening in each episode. This sure feels like it could be the real thing, any opinions?