Am I in labor???

Kells

39w2d today, have been having tightening of my belly all day, (Braxton hicks). I started to feel them more often, and I've been having contractions persistently for the last 2 hours between 5-8 min apart. Except for just now! I started moving around more and didn't have one for 20 minutes! They aren't very painful, just tightening and a little crampy!