Anyone know what could be causing a cough for about 4 years now, i have an abuetrol inhaler and advair.. and have done ppi, none of that helped a cough .. have had test done nothing abnormal.. a little acid reflux thats it.. think maybe an allergy? it seems to be like a little tickle that triggers this constant cough.. and its not like cough attacks just a lil .. aheh .. but when i workout it gets worse.. but the inhaler doesnt seem to make it alot better.. might help a littl ebut not much.. anyone have a clue of what this could be? or what i could do for it?