<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, Ive been experiencing side pain, frequent urination, fever and nausea. What do you think is wrong with me?  <response>: Based on your symptoms, it seems like you may have pyelonephritis. This is an infection of the kidney and urinary tract. It can cause pain in your side, a frequent urge to urinate, fever, and nausea. 