Fee, You are only 34 weeks, I would do some research darl, get all the information and have the extra ultrasounds (In a few weeks time)to determine if you are one of the very few who have this problem. I would give it a few more good weeks before making any decisions, I have had 4 babies and very shortly will be having my fifth and none of my babies have ever engaged until active labour. I have birthed them all vaginally.
The actual number of women who have CPD is very small, yet there seems to be an increase in women having unneccessary C/S. Call me cynical but check your OB's C/S rate. OB's seem to be lining their pockets with this one and have a very neat date book as well.
I to hope Kelly or one of the mods sees this and reply's to you, this site has some really good information about this. Of course if you are one of those very few women good luck with everything.