Continue coughing. Here, please help.

I have done CT PNS there is no issue with sinus, it is clear, but in CBC report there is few% of infection. I do have allergy from rice, clove, dust and coconut. I am totally avoiding to eat this. Doctor has prescribed me montalukast and prolastin and I am following from 1 month and I can't see any results still I am coughing so much. Also, this medicines causing me side effects like aggression, mood swings. I am daily drinking warm water and not eating any cold and sour food. Even if I any fruit like apple or mango or pomegranate it cause me continuous cough. I work in IT so sometimes for a month I need to work in might shifts too. Else I do eat food on time and do exercise daily. What would be the problem here, please help.