Hello, I Think My Condition Is Called Very Severe Emphysema.

Hello, I think my condition is called very severe emphysema. I don't think I am coughing-up blood or losing blood through my bowels or kidneys. Just walking a very short distance (15 feet) with oxygen is very difficult and causes extreme laboring to breathe. I have lost considerable weight and have little appetite. I was a heavy smoker for a long time. I have been at this stage over a year. From what I have described, what is my life expectancy? THANKS, JAMES