38 weeks is not really full term. He probably doesn't want to come yet because he needs to cook for a week or two more. Try to be patient.
I agree with Anniebrooke. And being a 2 1/2 is great for 38 weeks... Your body is doing what it's supposed to nicely, I was around that at 38 weeks with my son. Try to just get some rest and enjoy the last week or two left. :0)
I'm 40+2 and I am only dilated to 2 cm. just be patent.