I Have Had A Cold/flue For Six Weeks And A

I have had a cold/flue for six weeks and a wheezy cough for 2 weeks. I have had a chest x-ray which says I have a slightly enlarged heart. Had an echo before this cold for missing heart beats. I have a slight valve back flow of blood and slight fluid around the heart. How do I look after my heart now? How do I get rid of this wheezy cough. My age is 67and am female.