Chronic nausea & constant tiredness. Can sleep for many hours even after an afternoon nap. Am diet controlled diabetic & COPD diagnosed. Have been referred to gastroenterologist, but should I be looking at lung fibrosis ie would that cause chronic nausea & aching. Have gone back to smoking to alleviate feeling sick & can feel changes in my right lung. Have recently coughed up an item similar to a hard pea. Have lost appreciation of food due to the nausea.