It is clear that there is only one more option left for you Mama2b. You will just have to move the crib, bassinet, change table, baby toys, mobile and some changes of baby sleepers into your womb. You may be able to send the toys, sleepers and mobile in orally, but I'm afraid the rest will have to go vaginally.
Report back in 5 years and we will send a kindergarten teacher, some crayons, paper, safe scissors glue and pipe cleaners in. Also, kids should have a pet. Richard Gere might recommend a hamster (yes, I am going straight to hell) but I am partial to dogs personally. Better shift some stuff around in there and make some room for the pet too!
Okay okay, all joking aside, whether you've messed up on the dates or not, I think as long as baby is doing well everything should just be left to happen on it's own time. The only thing I would worry about with being 4 weeks late would be the baby getting so big I wouldn't be able to physically push him/her past my pelvic bones. Lucky for me (this is the ONLY time I can claim 'lucky' about them) I have super wide hips. I don't know what your frame is like, but I think we're pretty much built to stretch and rock and roll with all the punches that come along with delivering a baby. I think you'll be just fine.
Maybe this is the sign of a passive baby? Perhaps it is just baby telling you he/she prefers a slower approach to life. Baby is stopping to smell the proverbial flowers....and mucus. So to speak.
Hang in there! It won't be long now, and if it is, at least you will be able to claim the longest live pregnancy in the world. Guiness Book should be calling you any day now!