I am so sorry to hear of your latest challenge. My late father passed away with lung cancer so I can relate from the perspective of a caregiver.
Also wanted to piggyback what pbetra said about diet. Last year, I read somewhere in a news article, there was a story where the Marchioness of Worcester firmly believed that by changing her diet to alkaline foods, her cancer (I can't remember which type) pretty much totally disappeared.
Strength and grace to you as you face this new challenge head on, my dear.