Burning sensation in Chest. Chest pain)

Hello Sir/Madam, I am having cough since Aug 2020. Consulted pulmonologist as I am started little pain in Chest in Nov, after trying medicine from PMP. He has asked to take X-ray, CBP & ECG. ECG was abnormal and he asked me to take TMT and 2D echo. I have taken Both the tests and consulted Cardiologist. He said everything is normal and gave some medicine for muscle pain. After 1 month also I am not getting releif from cough and discomfort in Chest is same. I again consulted other pulmonologist he also said everything is fine it could be becoz of gastric issue and written Ivepred 4 & Montuvir. I got little relief from cough after using them for 4 days and It was ok for that week. After completing 1 weeks medicine I again started feeling same.  Cough is not severe but it's there, after lying down for sleep I get little bit more and then it's fine. No cough during sleep. Discomfort in Chest still there. Please suggest me a way to get rid of these problems (cough and chest pain)