Feel like my body isn't doing anything 37w5d

Besides the rare dull back pains and pressure I feel down there sometimes, I feel like my body isn't fully gearing up for labor. Maybe I'm over thinking it. I haven't got checked yet but hopefully this week at my 38 week appointment. I was expecting braxton hicks or even irregular contractions but nothing. Any insights ladies? Btw this is my 2nd baby and baby is head down weighing in at 6lbs 5 0z at ultrasound last week.