Braxton hicks or baby?

C
I've read that a sign of Braxton hicks is the tightening of the stomach. My stomach gets tight often (without pain just a bit of discomfort) but it's never very low, it's always higher like close to my ribs. Is this the baby pushing or Braxton hicks? I'm 37 w 3 days if it makes a difference. (Ftm)