what happens after he quits chemo?

My husband has stage 3b lung cancer and has just decided to stop the chemo.  After each of the two treatments he has taken he got terribly sick with pneumonia as well as all the other things that come with chemo.  I respect his decision but don't know what happens next.  I worry about taking care of him myself and if I have the capabilities to do it.  Does anyone know what I can expect?  I feel like I am walking around with a blindfold on.  Any responses would be helpful   thanks