Symptoms of pulmonary embolism vary, depending on the severity of the clot. Although most people with a pulmonary embolism experience symptoms, some don’t. Pulmonary embolism symptoms may include: Sudden shortness of breath — whether you’ve been active or at rest. Unexplained sharp pain in your chest, arm, shoulder, neck or jaw. The pain may also be similar to symptoms of a heart attack. Cough with or without bloody mucus. Pale, clammy or bluish skin. Rapid heartbeat (pulse). Excessive sweating. In some cases, feeling anxious, lightheaded, faint or passing out. Wheezing.