Hi N.,
I am a labor doula on Long Island and have a few "tricks" for getting baby to drop. They may seem silly, but they've been proven to work by some VERY experienced ladies :)
You can try the "incline" (elevate your legs WAY up, maybe even use an ironing board) for a good 10 minutes at a time, go on your hands and knees, sit on the yoga/birth ball a lot, sitting leaning forward, yoga, maybe even check with the chiroprator for an adjustment. Take a look at www.spinningbabies.com
Ice packs (or bags of frozen veggies, etc.) on your belly where the baby is may annoy him or her into moving away.
Swimming, mostly doing handstands in the pool, is a great way to turn babies that are breech or head up. It is fairly easy to do and can be relaxing too since you're weightless in
water. You can do a handstand for a count of 5 and repeat it 5-6 times. Do this for 4-5 days. It is great for babies have settled in the pelvis in the not head down position. The handstand actually floats the baby to the top of the uterus giving the baby room to turn on it's own.
It's possible that the baby may have a hand or arm next to his/her face that makes it complicated for it to turn or appear to be too large when the head could actually be small.
Whatever the case, keep in mind that you CAN birth your baby. There is NO good reason not to try, unless you are told MEDICALLY otherwise. "Too big," "not dropped," "overdue" - those are not good medical excuses. Give the baby time to do it's thing. Maybe the above will move it along a bit. Don't let the doctors bully you. This is YOUR baby and YOUR birth!
Be positive, and good luck.