Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern..
As per your complain as you had cold/flu for two weeks there is a possibility that the infection has spread to lower
respiratory tract causing conditions like bronchitis,
lung infection etc that is leading to
severe coughing..
I would suggest you to consult an Otolaryngologist or a Pulmonologist and get evaluated and a thorough clinical evaluation can help in diagnosis..
He can also advise investigations like chest x ray..
He can advise you to take antibiotics like Cephexime and Azithromycin, decongestants like
Phenylephrine, mucolytics like Ambroxol,anti allergics like Allegra or levocetrizine, cough suppressant like
Dextromethorphan and Guaifenesin, warm compresses over chest, steam inhalations and warm saline gargles..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.