I'm not really qualified to reply to this post but I think it all depends on his range of calling 3bets. If he has been calling you lite and you think he would call with some mid sized pocket pairs then you have to call his turn bet. He could be betting broadways with a flush draw, some smaller pairs which you beat. You are far behind JJ and TT, he probalby 4bets anything else but he has position so who knows.