Your body has probably reached the “I-can’t-take-it-anymore” stage. Your gait might interfere with your energy burst and this could annoy you a bit. It’s just a matter of time, soon you’ll have to deal with the entirely new changes in your body.
Your doctor will also check your cervix to see if it's 'ripening' its position - how soft it is, how effaced (thinned out) it is, and how dilated (open) it is can all affect when and how your labor is induced. If you don't go into labor on your own, you'll be induced, usually sometime between 41 and 42 weeks.