Clearly, all large nodules were, at one time, small nodules but, at any given point in time small nodules are unlikely to be malignant, even when bilateral. Nodules associated with infectious and/or inflammatory disease are just as likely to be multiple, as to be solitary, This is especially so in a young person without any obvious risk factors and no sign of tumor elsewhere, no fatigue and no weight loss. But, do try to locate previous chest X-rays for your Doctor to have a source of comparison and be able to offer optimal diagnosis.
I really need to know please