I'm a bit worried about some health stuff and hoping you can give me a bit of clarity. I saw a pulmonologist, and they did an X-ray. The ECG was normal, but it showed pulmonary ventricular contractions. My oximeter reading was 99 for oxygen and 123 for heart rate. The doctor said I dont have any breathing problems, but I am feeling short of breath and a tight chest. Could I have COPD? What kind of oximeter reading should a COPD patient have, or when should I be concerned about my breathing? I dont have any allergies, cough, or cold. Would really appreciate some guidance here.