WHOAH!! What do I do on this Turn ??

[quarkncover]

Is raising on the Turn here right out? If it is a flush draw trying to get a cheap river isn't it proper to make a Pot-sized raise here or more to make villain make a mistake according to the Fundamental Theorem of Poker? Calling here leaves me with a tough river decision if it blanks out and villain leads for 2/3 pot or more. On blank river do I call any 1/2 pot bets or greater, 1/2 pot bet on river is giving me 3/1 on call and I really can't see folding. If checked to on river do I make a value bet? Essentially, I really don't see what just calling on the turn accomplishes.