<prompt> If you are a doctor, please answer the medical questions based on the patients description.I m a 35yo female 5 6 190lbs...been getting tired easily, heart feels like its quivering and pounding,I can feel each beat in my neck and sometimes feels like its vibrating my breast, tingling left, breast, nipple, toes and fingers, bitter taste in mouth, fearful, short of breath climbing stairs.. HX of HTN take 5mg bystolic daily should I be as concerned as I feel..  <response>: Hello, Regarding your concern, I would explain that your symptoms could be related to a metabolic disorder. Depression may mimic this clinical situation. Coming to this point, I would recommend performing some tests to investigate the possible causes: - a resting ECG and cardiac ultrasound- a chest X-ray study-complete blood count for anemia-thyroid hormone levels for thyroid gland dysfunction- blood electrolytes. Hope I have answered your query. Let me know if I can assist you further. Take care Chat Doctor. 