I believe it is possible to get a biopsy off lung nodules using a needle, and it is an "out patient" process, not a big deal to recover from, I believe. I have never had such but my wife did about 6 months ago. Best I can recall she didn't have any difficulties - was back to normal the same day.
Hello and hope you are doing well.
Understand your predicament. Any other tests like spirometry were done? This helps to detect if your problems with inhalation are due to causes like Asthma or COPD. Your doctor may ask for a Chest CT to get a complete picture. Also, only a biopsy of the nodule can give a confirmatory diagnosis.
Now if your symptoms worsen or if you develop additional symptoms like cough or fever, consult your primary care physician for an evaluation. Take Care.
Hope this helped and do keep us posted.