When does a very bad cough need imm med attention? No mucus or fever. Cough so deep causing pain in chest. And makes breathing clear hard. Pneumonia?

Peroxide Humidifier. Do you have a cool mist humidifier? Fill it with one bottle of hydrogen peroxide, and two bottles of water. That will give you a 1% aerosolized mist of hydrogen peroxide. Just put it in your bedroom, or wherever you happen to be. The peroxide kills the bugs on contact (virus or bacteria) and breaks down into water and oxygen. I've used this regimen to treat pneumonia without antibiotics.