What can I do for my emphysema without going to a doctor?

Quit smoking... The best thing you can do to prevent further lung damage and allow your lungs to heal over time is to quit smoking. Your doctor can help you quit smoking and can offer other treatments as well. Testing can be done to determine how bad your emphysema is as well. Good luck!
Stop smoking. Stop smoking if you do, avoid smoke exposure or second hand smoking, avoid extreme temperature and see a physician in case you need medicines.
Try the following. Stop smoking if you have not done that, daily moderate exercise, and increase intake of fresh fruits and vegetables. See your doctor for up to date vaccination, pneumonia and influenza. Of course you need more than that, but that is your choice to make.