Mildly said:Yay hope this is it for you
Try this website for timing your contractions http://www.contractionmaster.com/index.html
At my antenatal classes they said call the CDS when you have regular contractions of about 10 mins apart and ones that you can't talk through. Chances are they'll tell you to have a bath and take a couple of paracetamol and them call them back if things progress after an hour or so!
Good luck and keep us updated