<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, Ive been feeling really sick lately. Ive been vomiting, having shortness of breath, difficulty breathing and chills. What could be the problem?  <response>: Based on your symptoms, its likely that you have pneumonia. Pneumonia is an infection that inflames the air sacs in one or both lungs, which can cause coughing and difficulty breathing. Its important that we start treatment right away to prevent complications. 