Call your insurance and ask for a name of a different doctor or ask your therapist to recommend a doctor for you. If your condition is worsening, you need to see a doctor, any doctor. I don’t know where you live but there has to be more than one doctor in the area.

Also if your doctor isn’t in the office there has to be a system that determines what a person should do in doctors absence. If there is no specific guidelines at doctors office, your best bet is to call your insurance. Many insurances provide you with over the phone or online consultations with doctors or nurses

I have to add that if you have a referral for a hospital, they likely would take you in. The entire hospital can’t be possibly just testing for a virus and not provide any other treatments. That’s not possible. Call the hospital and ask when you can be admitted