and pleural effussion in a lady can be classically due to sarcoidosis
vascular diseases. TB is always a possibility. What was your diagnosis last year? Was the fluid ever tapped? It would give a fair idea about diagnosis.
Pericardial effussion can cause compression of the heart and can be fatal.
If not done in past, I would suggest a pleural/ pericardial tapping (removal of fluid for examination) and make a firm diagnosis.
I feel akward to say this... but pericarditis can be life threatening and has to be attended timely. If your cardiologist is too busy, you can always obtain a second opinion
from some other cardiologist!