Karina,

My waters didn't break (or at least not until they got broken later on in labour, and I think I was in the shower, so I didn't really feel that).

But I kind of new that my labour was starting as I had "squeezy period pains" around my back. I had always expected contractions to be highter up, around my tummy, but these were around the back of my hips, and very sqeezy, and once they became regular, I knew it was labour.

(Plus I was 4 days overdue)