In Generalized Anxiety Disorder (GAD), the physical symptoms of anxiety can be so severe that you might feel you can’t breathe or swallow or might even die. The typical physical symptoms of anxiety may escalate to produce panic attacks, which often becomes cyclic. In GAD, heart palpitations are so pronounced, accompanied by chest pains, tingling sensations in your extremities and nausea, you might well think you are having a heart attack. These symptoms are so debilitating, you may live in fear of this unexplainable phenomena recurring. In the case of anxiety attacks, the symptoms most often include heart palpitations, the sensation of not being able to swallow, a whitening of the skin on your face, as though the blood has left your face, lightheadedness or dizziness.