I'm 40+3 today, so I know I'm hardly late by anyone's standards, but this is really starting to frustrate me... 
Since the weekend (38+4) I have had period pain and backache and that sense that 'something' was just 'different' about all the little twinges and niggles. Saw the mw at 38+6 and everything was fine. That night I had a few mild contractions, I just went back to sleep as they weren't that strong and come the morning they'd stopped. Yesterday (40+2) the mw did a sweep and found that I was fully effaced and 2cm dilated so she was hopeful labour would start soon.
But now its the morning, and while I still have backache and period paid (seriously, I want to get a hot water bottle on my abdomen for the cramps!) that are really starting to frustrate me as I feel constantly uncomfortable, and I've had some mild and irregular contractions.... nothing.
I know sweeps don't always work, but how long have other people gone with this 'period' pain and nothing happening?!