It can change. It has no bearing on when you will give birth, because you can remain like that for a few weeks. And, anything short of walking or sex(which won't work unless baby is ready)...unless baby is ready to be born, nothing will make it go faster. Only time.
Walk around. Thats what I was told, I don't think it ever helped me though, I just kept telling myself, " He can't stay in there much longer " He's coming out real soon, NO MATTER WHAT!!!!!!!~CONGRATS ON THE UPCOMING BIRTH OF YOUR NEW BUNDLE OF HAPPINESS.'~Luck~