First of all, I am so sorry you both have to deal with lung cancer. My Mom had small cell lung cancer and lived for 1 1/2 years after diagnosis (she died July 18, 2008). It was a long and difficult battle for my Mom (and me as her sole caregiver). She went through a lot of physical and emotional ups and downs in that time. Everyone is different and not everyone has the same symptoms or problems. I believe one of the most important things to do is think positive.
My thoughts and prayers are with you.