Panic attacks typically begin suddenly, without warning. They can strike at any time â when you're driving a car, at the mall, sound asleep or in the middle of a business meeting. You may have occasional panic attacks or they may occur frequently.ou may feel fatigued and worn out after a panic attack subsides. Panic attacks typically include some of these symptoms: 1  Sense of impending doom or danger. 2  Fear of loss of control or death. 3  Rapid, pounding heart rate. 4  Sweating. 5  Trembling or shaking. 6  Shortness of breath or tightness in your throat.