I posted a thread like this a while ago, my waters broke with DD, first ctx was 45 min later, by the time we got to the hospital I was 7-8cm and she was born 35min after the internal anot long after arriving in the delivery suite, I also dialated quickly with little to no pain and my OB said this time will be quicker. I am on a constant dosage of drugs atm to stop labour as I am already having ctx's and have been for over two weeks and have been on the meds for 9 weeks due to extreme BH's (my have been having ctx as well but I didn't realise that is what they were as I didn't have any with DD it was all back pain). But there will be a point where they stop working and you go into labour anyway, but hopefully they give me a bit more of a chance to get to the hospital.

For me it would be an amulance call if I am home by myself, or if I happen to be in the car (which is very mimimal as I am on bed rest), I will head stright in if I can, if not stop and call an ambulance.