I'm back from the doctor with qualified good news! No change in the mystery nodules in my lung (which is good news) but neither have they shrunk. Cancer still hasn't been ruled out but it's no longer a definite probability. Scheduled for new blood work to test for cancer-specific proteins on Wednesday, then assuming negative results, another CT scan in three months.
Looks like you guys are stuck with me for a while longer. And many, many thanks for the support, folks. Much appreciated!