You had the time in the clinic and made an informed decision.

Just because someone questions you, and asks why not x, does not mean you have to toss out all your thinking and start over! It just means you explain WHY; not so much to make that person see things your way, as to
re-enforce to yourself what YOU want and why it makes sense for you.

Unless you had already been second guessing yourself, I wouldn't let just one question throw you out into the ocean!

You are not asking should I do 4 years of this or 4 years of that; you are asking should I do 2 years of this or 5 to 6 years to get to that, when I am not even sure I want THAT. (whatever it is)