What Do You Do When, The Cardiologist, The Surgeon And

What do you do when, the cardiologist, the surgeon and the personnel physician are not communicating with each other and all 3 are giving you different cocktais of medicine to take. One orescribes high blood pressure medicine while you are having low bloos pressure reading after by pass surgery, one gives lasix the other says do not take it. Fluid keeps building in chest cavity. Cannot get Doctors to communicate. It as been 3 minths since surgery. Frustraited and hopeless, sees no one really cares.