nothing really, i just sort of felt 'different'. Its hard to explain, for example, 10 days before my dd i knew that it wasnt going to be anytime soon then 5 days before i remember telling someone that i felt different and it wasnt going to be really soon but that i would be suprised if i went past my dd (i went into labour the day before my dd).
Maybe it was mothers/womens intuition or just wishfull thinking but i cant explain it except that i just felt like it was nearly time