QQ on K high board

[swishes2000]

I think your small bet on the flop and check on the turn quite possibly induced a bluff. I think a stronger bet on the flop would have given you a better idea of where you stood on the turn and maybe would have saved you a call there. In that case, you spent money to save money.
I think a mid pair is a possibility, but if he's really a rock then check fold on turn is ok.