My husband had something similar a few weeks ago. He developed pneumonia in his lower lobes a week after body aches, fever, and cough. He had all the symptoms of COVID-19 and they still didn't test him. Anyways, all the medicine prescribed did nothing to help and he eventually got better on his own. He was sick for a total of 2 weeks with it being pretty severe and shortness of breath for 6 days. He woke up one morning and just felt better. Hang in there, if you have severe breathing issues go to the doctor.