influenza like most viral illnesses can set the stage for secondary (bacterial) infections in other areas like the ears throat sinuses or lungs. since you have an "extremely sore throat" my vote would be for you to go to urgent care so you can be properly examined.
tested + for flu a & started tamiflu helped but been 7 days now and ears hurt and extremely sore throat. . hurts to swallow. no fever. clear nasal drainage. non productive cough. is it common to have bad throat pain and swelling and ear pain with flu? do i wait it out or go to urgent care center in morning?