Dear Tilly,
As a fellow liver metster, I remember how confronting the diagnosis can be, but can only repeat what some of the other women have said - it is not a death sentence. We are all different and there are many treatment options available now. It is over 2 years since I finished some chemo which shrank the liver nasties almost completely, and I am currently living well. Treatment continues, but minimal side-effects for me.
You will get a better idea of what is going on once you see your oncologist and work out a treatment plan. Talk to him/her about your proposed holiday too; personally, i doubt 3 weeks would make a difference and am always in favour of seizing the day! Just make sure you are comfortable with what is proposed.
Best wishes.... Pam