Hi there!
I was the same as you with my second, as with my first, my waters broke and there was no mistaking that I was in labour as the contractions came hard and fast. My sign in the week leading up to labour was I felt like I had morning sickness again. I felt so lethargic that I could barely move and threw up once. Two days before I went into labour I felt on top of the world again. On the day of labour I had one sharp pain but I thought I'd pulled a muscle cos I'd run after my DD just before it happened. But the pains then started to get more intense. Within two hours I was in established labour. I just knew too.....for some reason I just had the urge to get all my stuff in my bag even though the pains weren't too bad. I had plenty of time to get to the hospital. Sounds like you will too. Good luck with it all ladies!!