Speed up pregnancy 36 weeks cant take any more?

im 36 weeks now and i can feel the baby very low and midwife think head is engaged i have also been told baby is going to be big im very small was 7 stone before pregnancy. this is my first im also suffering extremely bad pelvis problems currently on crutches apart from spicy foods pineapples, and castor oil and lots of walking (tried) what is the best way to speed things up ??