Hi, My mother-in-law have heart problem, her feet are swollen especially her left ankle & feet, but now she have a very bad cough that she can't get rid of, she have taken cough medication, antibiotic, but this cough still wouldn't go away this is what i want to know when fluid build up around your heart even in your lungs, could there be something else wrong, or to much fluid have build up in here lungs & around her heart the reason she is coughing