Baby movement vs. cramps

For the last two nights I've had something like light cramping in my pelvic area. Kind of like menstrual cramps. I'm 39 w 5 days and Ftm.
I'm starting to wonder if it's just my imagination or if the baby is just pushing hard and making me extra tender. 
This kid has been super active. 
Ugh! The wait is killing me! I have a doctors appointment Tuesday. I can't wait to see my docter. Last time I was 50% effaced 1cm dilated. 
Could it be early labor or just baby stretching really really hard?