@chris8515– Hello again Chris. You really don't need one more thing do you? Why did your doctor order a CT scan ? I'm assuming that it was a pulmonologist? You said that you have had CT scans that show GGN- ground glass nodules. Are you being followed by a pulmonologist? GGN can be a lot of things and if more than one shows up, or grows than it really needs to be followed.
Here is some information https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6131181/
I hope that your headaches are better. Are you feeling better?