Braxton-Hicks contractions are also known as false labor. It can occur frequently before your due date. They aren't the real thing, but they may give you a false alarm. You'll know that it's Braxton-Hicks because rather than the fairly consistent timing of real contractions, they occur irregularly and inconsistently. They also tend to happen when you're tired and go away or decrease when you get rest. The contractions may go away when you take a shower, move to a different position, or change activities.