What other symptoms you have?
Are you taking any medication?
Fluid in the lungs is a serious ilness. It is complication of certain serious diseases such as heart failure & if there is fluid in lungs it causes shortness in breath & weezing.I dont think yoiu have any fluid in your lungs.
You may have cough stucked in lungs.
1.Expectorant syrup containing salbutamol & guaiphenesin.
2, Have a chest X-ray PA view to reveal the abnormality.
Hope this helped
Any more help.......
I can understand your problem.
You need physical examination & examination by stethoscope to listen lung & heart sounds.
So I advice you to have a chest X- ray & consult chest physician for examination & treat accordinglly.
All the best.........