How does the dr know that your nodules are not cancerous? Have you done fine needle biopsy? Even biopsy result shows non cancerous, it does not mean that it is 100% noncancerous.
e.g. You have an orange that is half rotten, if you take cells from the good half, the result will be good.
go to govt hospital and have FNA every 3-6 months if you really don't want to do the operation now.