<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been having severe back pain, hemoptysis, weakness, and coughing for the past few days. Can you tell me whats wrong with me?  <response>: Based on your symptoms, it seems like you may be having a pulmonary embolism. We need to do some tests to confirm it. Please go for a chest X-ray and CT scan immediately. 