Fortunately this is one area therapy CAN help! It only feels unpredictable when we don't know what triggers it. Through therapy, discussing and being encouraged to keep track of the melt downs (when, what time, day, what were you listening to on radio or thinking or where were you driving etc) can you figure out just what is triggering you. Then either by avoidance and/or flooding those reactions become less and less and farther apart, less random.