I had one a day past my EDD, but told the dr about the inconsistant pains I'd been having since the Saturday afternoon/Sunday day (my Obs appt was on the Tuesday) and he said not to worry bout it.
I had my S+S at 9am, went walking around the shops for an hour, got back to my ILs place, slept from bout 12pm to 3pm (without meaning to) - I'd slept for that long because I was feeling really sick from the S+S and waited for DH to come pick me up (he didn't want me alone after I'd past all three of my EDDs - the 10th, the 16th and the 19th of October)
Anyways, started really feeling things at 12pm (the sickness and the pains getting worse and worse) - got home at 8pm, tried to sleep at 10:30pm, and that's when it started getting intense - 6:56am the next morning, DS was born