Coping With Pleural Effusion

@ 2 weeks ago i was sent to the emergency room of the hospital where I had had minor heart work done with chest paine and diminished breathing. they drained about 1 litre of fluid from my chest wall. Many tests were done and everything ruled out but allergy, drug interaction or an exotic parasite. A few further tests are planned, but the doc thought most likely my cause was the beta blocker blood pressure med I take and have for years. change me immediately to a non bb. but I do still have some breathing difficulties and minor chest pain. My concern is that I am constantly working with clay. I am reassured that clay is not a health issue when wet, just dry. Though that I think seems that if have a direct lung effects. I have a history of smoking and a aneurissm ascending aorta, which is stable… My lung functions and tests show no problems. Anone have ideas? (By the way the drainage procedure was pretty much painless and comfortable.