40+ weeks having A LOT of pains in pelvic area. What and why?

Today I'm 40 weeks and 2 days. I've been waking up with the worst pains in my pelvic and upper thigh areas. Right now it hurts to even move. Get up from sittin down. Walk. Basically any movement that involves my legs and pelvic muscles. it sux. I wish this baby would just come out. NATURALLY. What can I do to ease the pain?