Lung Function Test indicates possible problem with vocal chords. I have had a cough for almost four months which started with respiratory virus. I still have mucous in throat, sometimes a lot, sometimes a little. Taking meds for ongoing heart burn but have been taking them for nearly four months with no change in mucous. Wondering about GERD? Dr sending me to ENT specialist re vocal chords but want to get an answer/resolution to the mucous/cough. Also, my sinuses have been clogged for about three months too.