Physical Symptoms • Shortness of breath or feeling of suffocation. • Rapid heartbeat or palpitations. • Dizziness or spinning. • Excessive sweating or trembling. • Chest pain or pressure. • Digestive upset such as nausea or bloating. Psychological and Behavioral Symptoms • Intense fear of death or losing control. • Feeling of detachment or unreality (dissociation). • Chronic anxiety or difficulty concentrating. • Racing thoughts or mental confusion.