My husband is 82 years old has smoked since the age of 13. He has a persistent cough with phlem, he is 6 foot tall and weighs 121 pounds. BMI=16.2. He is fatigued and sleeps 12 to 15 hours a day. He had a case of shingles 2 weeks before Christmas. He is not going to go to a Doctor and wants no intervention. At 82, I get that. Do you think he is in the last 6 months, I of course, believe that he has stage IV lung cancer.