Hi there! You are right, I believe only those of us going through lung cancer really understand, others can try, but until you are there ... you can't really "get it".
Ivy is a good friend of mine and we are all amazed and thrilled that she was able to get surgery and going from Stage 4 to No Evidence of Disease! There have been so many advances. Also, although every case is different, many others have told me that the rash is worse at the beginning while your body gets used to it, so if it gets better, it doesn't mean it stopped working.
Another friend that I met through Lung Cancer lives in Australia and is on targeted therapy so I know it's available. Are you involved in any support group with other lung cancer survivors, whether in person or online? Are you interested? Look forward to hearing back. ~ Alisa