Performance anxiety sucks!
Both my bubs were late and on the 'due date' of my second bub I cried and cried because there were no inklings of labour
You have been given some great advice here - bath, relax, early night, etc so do all of these things and definitely turn off your mobile phone, let the home phone go to message bank and avoid Facebook. It's tome to turn inwards and cherish these final few moments with your bub-on-board
Warm wishes for you and hoping you have a wonderful birth and a blissful Babymoon