With DS i was having braxton hicks for weeks before. The day before i went to the hospital and i was so angry cause they would not book me in to be induced and they would not do an internal to see if i was dialating. I was so angry driving home with my sil she was agreeing to everything i said. Poor thing!!
Went to bed that night still a bit angry and my waters broke in bed!!!
So try being angry it worked for me lol...

Nikki