Having Chest pain. Me what should i do.

I am taking mondeslor and A to Z vitamin tab daily at night after dinner for allergy prescribed by Dr from last 15 days . I had a cough before 20 days and  after online consultation with Dr. He Prescribed me Allegra M,  AZEE antibiotics tab and Brozodex SF syrup for 5 days. After 5 days my cough was almost cured but I had a runny nose. Later cunstulation with Dr. He Dignosed  that I am having nasobronchial allergy and prescribed me. Mondeslor and A to Z tab for 21 days. My cough and cold is almost gone but from last 7 days I am having chest pain which is varying (some times in left or  right and some time in middle). Chest pain is more in evening and after lying on back Daily after wake up thick mucus is coming with cough. Please suggest me what should I do.