Need help finding a pulmonary doc.

I was hoping someone on here could recommend a good lung doc. I want to try to get my breathing alot better than it is. I smoked for 30 years and know it will never be great but looking for help. I also wonder if anyone can give me some opinions on HRMs. I am looking into getting one of those to try to help me. Any advise would be helpful. thanks in advance.
Veronika