Hello L.Sarg and welcome. So sorry to read of your dad's diagnosis and prognosis.  I don't pretend to know anything of treatments overseas but this website being about cancer research it might interest you to read the section on "Our research" .  I am attaching the link to get you to find a clinical trial.  When you follow the link you just type in the type of cancer and it gives you the information.  Let me say at the outset that I am no expert at this and it is in fact the first time I have looked this up; there is a lot of information about lung cancer trials.  If you want to go down this route then the first person to whom you should speak about this is your dad's doctor - this is what the website says.  (I realise you may have looked at this already.)

Obviously the personal matters you raise are for your decision but I can imagine you are confused and worried about what to for the best.  I would say take your time even though it may seem a matter of urgency.  Would your dad not want you to plan your life on the basis of what is best for you?  It might make him very unhappy if he felt his illness was disrupting your own life.  Until you have a child of your own you cannot imagine the lengths parents will go to to do what is the best for their child.  Speak to your teachers (?tutors - not sure what you call them) so they understand your situation and will hopefully be a bit understanding of your wish to spend time with your dad.  I guess what I am saying is "don't go crazy" - pardon me for putting it like this.  Just take things as they come along and remember your dad is not just a cancer patient but the same loving parent he has always been.  I don't know if any of this helps but I hope so.  Best wishes.  Annie

www.cancerresearchuk.org/.../find-a-clinical-trial