I went into labor only July 5th. July 5th and 6th would have been shared birthdays with people I can't stand because they are so nasty to others. I had my son 12:17 am on July 7th. I swear subconsciously I couldn't relax enough to have a baby those days. Midnight hit and all the sudden the baby shifted and we got a move on lol.
I wouldn't worry too much. Chances for a baby on your due date are slim.
Married to my best friend, living the navy wife life, and loving every minute of being a SAHM to DS (born July 2011)!