I Am 70 Yrs Old Very Healthy Female With 2

I am 70 yrs old very healthy female with 2 cases of pneumonia in 5 years. I had symptoms of virus with cough for 14 days & little relief. Given 1 dose of inhaler to calm lungs made it worse CT of lungs showed Haziness in left lung. Given z pack with 5ml benedryl before taking 1 each night because of antibiotic alleges. I start tonight because though thought viral dr wanted to treat it because of lung congestion & cough.