Cough for more than 1 year. Negligibl!

I am having cough for more than 1 year now...I have consulted a doctor and the tests showed some infection which was cured by medicines about 10 months ago and cough was relieved but the prob of cough started again...it starts and sometimes stops for 2-3 weeks and starts again but for the last 10 months I have not consulted any physician...I have to travel for 60km daily on 2 wheeler on highway and thought dust or pollution could be a reason but that does not appear to be the cause of cough problem...my job is a desk job and I spend around 8-9 hrs in front of computer sitting on a chair..there is very less or negligible body movement during this time and before and after this time also as I start from home on a vehicle and reach office on a vehicle only...I seem to have acid problem in stomach (not gas) because when I am sitting the acid in the stomach reaches my chest (which I feel) and due to which the cough remains all day but when I am at home walking and working cough is negligibl