Thank you for your reply. As I mentioned, they’ve ruled out all the common autoimmune diseases rheumatoid arthritis, thyroid issues, lupus as well as lymphoma and cancer. My heart is fine, and they’ve checked everything gynecological, including my ovaries; no endometriosis or anything like that. I’ve seen a wide range of doctors and specialists: pulmonologists, thoracic surgeons, hematologists, cardiologists, rheumatologists, neurologists many of them more than once. I don’t just get a second opinion; I get three, four, even five opinions. I’ve been battling this for a full year now, and even the biopsy didn’t reveal anything. And yes its frustrating