Yea, I used to sit on my excercise ball when I was pregnant. Of course, I had her at 37 weeks, but thank god she had dropped at 32.((actually her dropping really sucked!!)) I was on my feet a lot though. I would def. Try rocking on it and walking around. It wouldn't hurt.
The day I went into labor, before I left for the hospital, I rocked on my ball. It was awesome...I wish I would've brought it.
When the babies head finally drops, it puts pressure on the cervix which in turn begins to thin and dialate. If the babies head isn't on or near it, you could progress slower than if it's head were pressed and ready to go.
Are they sure that the baby isn't breech? If it is breech there is somthing they could do externally to rotate the baby. But yout body can't be in labor when they try to rotate the baby.
You'll be fine either way girl!! You're getting close!! It starts getting crazy now that you know your a couple weeks away from holding what's been kicking you all this time!!!!!
Sarah