Bad news: you're probably behind - this screams "flush draw," and turn raises (especially after your flop 3-bet) are rarely bluffs, unless villain is a known maniac.

Good news: you've got just enough in the pot that you can call and pray for another 4 or K on the river. There's also a chance villain has AK as well.

I at least call the turn. If the river's a brick I probably check/fold, and keep an eye on villain in case this kind of action happens again.