Hi! Welcome to HCM! Since 2 doctors have examined you and lab has run tests for you and no abnormality was detected in cardiovascular system so possibility of anxiety can be there. symptoms of anxiety is a response of the sympathetic nervous system (SNS). Symptoms usually are rapid heartbeat, chest sensations, shortness of breath, dizziness, tingling, and severe anxiousness.The most common symptoms may include trembling, dyspnea (shortness of breath), heart palpitations and chest pain. Often, the onset of shortness of breath and chest pain are the predominant symptoms; the sufferer incorrectly appraises this as a sign or symptom of a heart disease. However, since chest pain and shortness of breath are indeed hallmark symptoms of cardiovascular illnesses, attributing these pains to simple anxiety is a diagnosis of exclusion (other conditions must be ruled out first) until an electrocardiogram says that no heart problem is there.. as in your case A variety of treatments are available, including several effective medications, and specific forms of psychotherapy. People who experience anxiety can use a number of lifestyle changes like aerobic exercise, avoiding alcohol, caffeine, as well as stress-management techniques to help decrease anxiety. hope this helps.take care!