So I'm a physician in another state but I'm pretty sure they are following the same guidelines as my state when it comes to testing.
from the CDC recommendations for clinicians:
"Clinicians should use their judgment to determine if a patient has signs and symptoms compatible with COVID-19 and whether the patient should be tested. Most patients with confirmed COVID-19 have developed fever and/or symptoms of acute respiratory illness (e.g., cough, difficulty breathing). Priorities for testing may include:
- Hospitalized patients who have signs and symptoms compatible with COVID-19 in order to inform decisions related to infection control.
- Other symptomatic individuals such as, older adults and individuals with chronic medical conditions and/or an immunocompromised state that may put them at higher risk for poor outcomes (e.g., diabetes, heart disease, receiving immunosuppressive medications, chronic lung disease, chronic kidney disease).
- Any persons including healthcare personnel who within 14 days of symptom onset had close contact with a suspect or laboratory-confirmed4 COVID-19 patient, or who have a history of travel from affected geographic areas within 14 days of their symptom onset."
Basically unless you are sick enough to be hospitalized or some kind of healthcare worker you probably aren't being tested. If it seems possible you have it but the symptoms aren't severe enough to require hospitalization they are just recommending self isolation seeing as how a positive test won't change management other than the person not needing to self isolate.
Also I'm not quite sure I understood your last question? There a lot of confirmed hospitalized patients and a lot of confirmed cases that have already died in the hospital.