just relax. as Trillian said.
I went to 41+5. i went into labour the day my DH took of as i had to have the montering for contrations done. i think maybe also feeling 'safe' helps. i felt 'safe' knowing DH was there with me for when it started...but then again i was ment to go for induction the next day (day after DS was birthed) so maybe in my mind i let go and thought it was going to happen any ways?

Good luck and relax! your body knows what its doing...even if your mind isnt 100% sure!