<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been feeling extremely fatigued and have had a persistent sore throat for the past week.  <response>: Based on your symptoms, you may have mononucleosis. We will need to perform some blood tests including a complete blood count CBC and hematologic tests to confirm the diagnosis. We may also need to perform kidney function tests, an electrolytes panel, liver function tests, blood cultures and provide an intravenous fluid replacement depending on the severity of your condition. 