It would have been a cool b-day- and it could still happen.
My ds1 was 2 weeks past his edd so I had in my head the expectation that ds2 would take his time too. He did- 10ish days past edd. I only had one internal, the day I went into labor, and my progress wasn't very impressive. That's pretty normal for 2nd+ moms.
I suggest enjoying this "bonus time." I loved doing as much as I could with just ds1 or with just myself. I ran lots of quick errands, took ds1 swimming, went to the movies...we just got out and enjoyed life without obsessing about when baby would make his (or her) appearance. I loved that extra time.
Sending labor vibes your way!
Beth