I have heard of some babies who don't engage or get into position until labor. So that could be the case. I'm sure she'll get into position when she's ready

You're not 40weeks yet, so try not to worry about it too much.
Something I would recommend is seeing a chiropractor as they can help get baby in position and acupuncture or if you're scared of acupuncture there's reflexology which is the pressure points like acupuncture but without the needles.
I know she's not breech, but maybe trying the breech tilt will help some?
DS was pretty much in that position (though he was engaged) and I had a home birth with back labor, it's really not that bad. (Why isn't in in the cards for you?? If you have back labor are you saying you won't have a home birth?) Yes contractions and back labor isn't fun, but I did it! I was in labor for 26 hours....and because of his position, his head was tiled and not in the chin down position, I pushed for 3.5 hours. No tears or anything, all natural. His head was 14 inches too! It's possible so don't give up

Your body knows what to do!