I would like to know, if you have taken any treatment for upper respiratory infection
Whether it was antibiotic or just anti histaminics?
If it was antibiotic , whether you completed the course or not?
Still considering you have taken treatment and completed the course, I would like to advice you to follow few things helping to relieve cough
1]. Steam inhalation 3-4 times a day.
2]. Salt water gargling, again 3-4 times a day.
3]. You need to take cough syrup containing anti histaminic like Corex/Benadryl
syrup[If cough is dry].
If you have wet cough i.e with expectoration , if fever
is present and is severe, you need to consult physician as that indicates lower respiratory tract