Brief Answer:
Bronchitis and pneumonia.

Detailed Answer:
Hello dear, welcome to Ask a doctor service.
I read your query and here is my advice.

I think this is sign of acute bronchitis and pneumonia.
I think you should use antibiotics ex ( cephalosporines or amoxicillin).
Also using corticosteroid with aerosol will help you get cured faster.
I don't think the sinus decongestants and flu meds can help.
Also using expectorants help secretions come out like guaifenezine.

Hope I have answered the question.
Let me know if I can assist you further.

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