You may find some useful information here:
http://www.medhelp.org/posts/Respiratory-Disorders/Lung-Nodules/show/1055851?personal_page_id=873092
My recollection of the more recent replies on the above thread is that lung nodules are usually not cancerous.... but they can be. It is a good thing you are seeing a specialist to get your condition evaluated.
I believe a biopsy has to be done to determine if the nodule is cancerous or not... my wife had a biopsy done with a long needle - was a "out patient" procedure. I don't recall her having problems following the biopsy procedure.
Whay so much delay seeing a Pulmonary specialist? I had to see one as a follow up on a low blood oxygen condition was detected in me. I took only a few days to get in to see a Pulmonary doctor, and that included a day to get x-ray work done. Are you in the USA?