Patient presents to the clinic complaining of onset of allergy symptoms a couple months ago. Over the past couple weeks, she has felt progressively worse, c/o severe sinus headache pressure over her eyes and a constant sore/burning throat (3/10 intensity). She has felt feverish the past week but doesn’t have a working thermometer. She feels mildly better after taking 1000mg of acetaminophen. She has seasonal allergies but reports they have been unusually severe this year despite taking her allergy meds.  Her eyes and nasal passages itch and burn. She c/o severe nasal congestion and her nasal discharge is thick and yellow-green. She c/o bilateral cheek pain. She expresses concern she may be getting the flu since she received a flu shot at work 2 weeks ago and worries the shot may have exposed her to the flu virus. 


Formulate a comprehensive list of 3 differential diagnoses, a final diagnosis, and ICD 10 code.