My Braxton Hicks lasted longer than 30 seconds. Get up and move if you're having one. If it goes away with movement then it truly is Braxton Hicks.
Braxton hicks only last 30 seconds at a time where contraction generally last a little longer if the are coming five min apart I would call the doctor anyway just to make sure
Drink lots of water lady on you side and count how long they are and how far apart they are