Fluid in my lung three months aftertreatment

CCAOG

I have just found out that I have fluid in my lung after my last report. In September the doc told me I was in remission. Now he tells me the fluid is not pnemonia. He drained it with a needle and sent it to the lab. Next he said that them main cause of fluid in your lung is congestive heart failure and sent me for an echo cardio gram. My original tumor was attached to my heart and drained fluid into my heart sac. What should I expect now?