I had some prelabour crampy stuff for DD1 and DD2 for a couple of weeks before. With DD3 I had one day where I had some cramps about a week before she was born. Other than that, not until the day I went into labour. I only got mild cramps every so often that day so thought it was the normal prelabour stuff starting then all of a sudden I was in full on labour and had her 4hrs later. I thought because I wasn't getting any that it was a while away too.