Worry is a normal reaction to a stressful or troubling event, and it usually goes away on its own. But what happens when the worry doesn’t go away? Some people worry all the time—even when everything is okay. They might feel like their worry is out of control or feel like they just can't stop their worried thoughts. Others don’t notice their problem with constant worry until they feel physical signs of stress, like headaches, stomach aches, muscle tension and fatigue. We all worry sometimes. But if you seem to worry much more than other people and you worry so much that it affects the quality of your life, you may have something called generalized anxiety disorder.