My son(18) was told by his doctor to go to the ER ...

My son(18) was told by his doctor to go to the ER because he had COVID-19 (day 4) and coughing up blood/sore throat. They looked at his throat said it was tonsillitis and sent him home with a script. Did they check his heart? No! Did they listen to his lungs? No! Ridiculous medical care!!