Good luck! My waters broke at about 5am, and I had acupuncture that afternoon which helped things along. I thought I would have him that night, but we dragged on for another whole day!
The thing that got my contractions as intense as I could get them was nipple stimulation and lying still doing nothing.
As soon as I tried to focus on other stuff, everything stopped. So while walking is good for some, if its not working for you, stop, relax and try some visualisation or meditation. Sounds wacky, but it really worked for me
I had antibiotics started about 30hrs after my waters broke, and Hamish was born about 48hrs after they broke. They were preparedto let me go to 50 odd hours before talking induction.
I had a shunt put into my hand, and they just administered the AB's every 6hrs in the form of an injection through the shunt. I was still able to shower walk around, even go home until I was in labour. Dont be afraid to ask for other options or even negotiate a little.

Good luck!!!