My waters didn't go until I was about 9 hours into contracting.
I was beginning to think @Oh this isn't so bad I can totally cope with this' when they went and everything intensified. More fool me!
I was eating pineapple and curry, making DP boink me against his wishes, scrubbing the floor on all foors and walking miles (not all at the same time mind) and I couldn't attribute labour to any of these things. It'll happen when it happens.