Hi @scared2. Treatment options can be overwhelming and are evolving quickly. This is why we all need good doctors that can recommend specific treatments for our types of cancer.
Targeted Therapies are oral medications that are specific to certain drivers of lung cancers. The meds edit the mutations for the genes to return them to 'normal', thus stopping the cancer growth. Your husband's doctors should run biomarker tests to determine if you qualify for a targeted therapy. The cancer types that do qualify are things like EGFR, KRAS, ALK, MEK, etc.
Chemo is hitting all the calls in the body in hopes of killing cancer cells. Targeted therapy is 'targeting' the DNA of the cells that are mutating out of control. It's amazing science, but it does not apply to all types of lung cancer.
When people refer to 'mets', they are talking about cancer that has metastasized to another part of the body. IE, my primary cancer and tumor is in my lung, but that cancer metastasized to my liver and lymph nodes. I have/had liver mets.
Try to get some sleep, it's important for the patient and caregiver too. I know that's easier said than done in some cases. Have you received information on what treatment he'll be having?