Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain it seems that it started with upper respiratory tract
infection or cold which has progressed to lower respiratory tract and causing conditions like Bronchitis, lung infection
, COPD etc which is leading to severe cough and phlegm..
I would suggest you to consult a Pulmonologist
and get evaluated and a thorough clinical evaluation and investigations like chest x ray, throat swab culture and sputum culture
along with complete blood picture can help in diagnosis and treatment can be done accordingly..
Yu can be given a course of antibiotics along with a combination of decongestant like Phenylephrine, mucolytic like Ambroxol and anti allergic levocetrizine and another combination of Acetaminophen and Ibuprofen..
Cough expectorant containing Gueifenesin and cough suppressant containing Dextromethorphan
can be given..
Gargle with a warm saline solution that is by mixing 1 teaspoon salt in a glass of water and warm it to make a luke warm solution..
Do steam inhalations..
Avoid spicy and chilled foods..
Sip on warm water throughout the day..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.