I had a few BH but only when I was tired from too much shopping LOL when PG with Angus. When I rested they stopped.
I had a false labour and those were much stronger than BH but didn't really get longer than 40 seconds and 3 mins apart.
The real labour contractions were 60 - 90 seconds long and the pain was more concerntrated on my lower tummy and (sorry for TMI) up my bum.