Caitrin, towards the end I had so many of the same thoughts! And I wasn't overdue so I can only imagine how you feel. Don't feel guilty. I think it's perfectly rational to look forward to getting yourself back after being pregnant for so long.
I'm glad you didn't take the CO - if your body isn't ready it wouldn't have helped anyway, and might have put your sweet LO at risk.
I'm thinking of you today. Soon you'll be holding your precious baby in your arms!