<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, since my operation, I have been experiencing sharp chest pain and headaches, what could be wrong with me?  <response>: Sorry to hear that, but its normal to feel mild-to-severe pain after an operation. However, your symptoms suggest that you might be experiencing postoperative pleural effusion, which is the accumulation of fluid around the lungs. 