In my opinion, it is always worth receiving a second opinion. I know mesothelioma diagnosis often goes unnoticed so it is always worth a shot! You ought to let me know how it turns out. God bless ya!
Yes, a second opinion would be a wise choice given your 25 years of potential asbestos exposure. An experienced pulmonologist wouldn't laugh at 25 years of exposure; so make sure to stress how long and extensive your exposure may have been at a future appointment.
Anyone with a history of occupational asbestos exposure should get regular physical exams to check for signs of asbestos-related disease. At the first sign of lung effects, a doctor should order an X-ray and other imaging scans like CT, PET or CAT.
Best of luck to you.