I am having bronchitis since 3 months.

Please help. I started dry coughing since Dec 3rd week so I went to my family doc. he told me that I have bronchitis nothing to worry. He gave me T. Defgesic (6) and T. Lecope M for 5 days. After the course my condition was worse. Now my nose started running and my chest felt heavy like all the liquid cough was in the chest. This time he gave me (C. Augpen 625) (T. Ergomont A) and one cough syrup. But still my condition was same. My running nose and liquid cough was gone but dry coughing continued. So I went to the doc. again. This time he asked my to get a chest X-Ray PA view and then prescribed me new medicines. T. Ergomont A and T. Betnesol 0.5mg. After all this my condition is same I am coughing more frequently than before. Please help me I dont know where to go whom to consult. I have attached all my prescriptions and the chest X-Ray. Thank you. PS:  I dont have fever or breathing problem just dry coughing.