Recent diagnosis - non small cell lung cancer stage 3/4

Good evening, our family have recently received a cancer diagnosis. My mum has been told she has stage 3/4 lyn cancer, it's in both lungs and eveidenfe in the lymph nodes.  I can't loose her.  There is a consideration of chemo! 
 

Please advise, 

Other treatments? 
Cures?

CBD oil? 
thank you in advance x