I had similar signs as you...
then at 38 weeks on the monday i got 12hrs of painless regualr contractions.. then nothing
at 39 weeks on the Monday i got 12 hours of irregular painless contractions... then nothing
at 40 weeks on the monday starting at 2am i went into labour - contractions 3 mins apart...

Tiny show (like the size of my pinky fingernail) that i so could have missed the Sunday before... nesting like crazy that evening (i decided to clean the whole computer desk and file everything i could find)

I would say that they last 2 weeks were a killer, just waiting... Someone told me that i will KNOW when i am in labour, but i had friends that didnt... i can tell you at 2am I KNEW i was in Labour and this was it...

Goodluck - not long now Enjoy your rest