Thanks for your question on Healthcare Magic.
I can understand your concern.
By your history and description, possibility of worsening of underlying
pneumonia is more in your husband's case.
White patch on chest
x ray is suggestive of pneumonia.
His symptoms are not improving, rather getting worse after antibiotic. So his pneumonia is not improving and it is worsening.
Best treatment of pneumonia is identification of causative organism and start appropriate antibiotics.
For this he should
consult pulmonologist and get done clinical examination of respiratory system and
sputum culture and sensitivity report.
Culture will isolate the causative organism and sensitivity report will guide about effective antibiotic treatment.
Don't worry, with appropriate treatment, his cough and breathlessness will also improve.
Hope I have solved your query. I will be happy to help you further. Wishing good health to your husband. Thanks.