Very Interesting Spot w/ Bluff (probably best hand)

[TylerT]

Villain is 36/14 w/ a flop agression of 4.00. I think his range to be AK, KJ, or the flush draw because of his calling my c/r on the drawy flop. I think I have the best hand on the flop, simply because if he were ahead I think he would have 3 bet me.

Poker Stars, $0.05/$0.10 NL Hold'em Cash Game, 6 Players
LeggoPoker Hand History Converter

BB: $14.25
UTG: $4.30
MP: $12.35
CO: $14.35
BTN: $9.85
Hero (SB): $9.80

Pre-Flop: 5[img]/images/graemlins/heart.gif[/img] 5[img]/images/graemlins/club.gif[/img] dealt to Hero (SB)
2 folds, <font color="red">CO raises to $0.40</font>, BTN folds, Hero calls $0.35, BB folds

Flop: ($0.90) Q[img]/images/graemlins/club.gif[/img] T[img]/images/graemlins/club.gif[/img] 3[img]/images/graemlins/spade.gif[/img] (2 Players)
Hero checks, <font color="red">CO bets $0.40</font>, <font color="red">Hero raises to $2</font>, CO calls $1.60

Turn: ($4.90) 3[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">Hero???</font>

Now I have 7.40 in my stack, with the pot at 4.90. How do you think I should have continued with the bluff, keeping in mind that I'm 70%-80% sure I have the best hand?? I think I messed up on the turn.

Turn: ($4.90) 3[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">Hero bets $4</font>, CO calls $4

River: ($12.90) 3[img]/images/graemlins/heart.gif[/img] (2 Players)

Now, I'm still moderately sure he just has Ace King high or some other missed draw. I only left myself with 3.40 in my stack? How should I proceed from here?