My name is Marjorie, My husband last year started coughing up black goo, some large some small. He has had x-rays, ct, and one lung function test. With nothing. I finally have the VA taking over, they are ordering the same test. Is there any advice you could give us on what doctors he should be seeing. On the 15th he is having a pulmonary lung test. We have taken pictures and showed them to the doctors..