You had no plan once you saw a 3bet otherwise the flop and turn decision based on the cards that fell should have been really trivial - if he has AA/KK then you just go 'meh' and move on - based upon what you already knew you were going to do of course.

As this is your 2nd hand and its likely your opponent is playing ABC, if they are even thinking about it, and your hand is face up, fold turn as played as his line screams AA/KK