AQs - 449 - 3 opponents

[Riku]

UTG 50/0/o.5AF/25wtsd
UTG2 55/0/o.06AF/63wtsd

PokerStars 0.05/0.10 Hold'em (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is BB with Q[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/heart.gif[/img].
UTG calls, <font color="#666666">1 fold</font>, UTG+2 calls, <font color="#666666">1 fold</font>, MP2 calls, <font color="#666666">4 folds</font>, <font color="#CC3333">Hero raises</font>, UTG calls, UTG+2 calls, MP2 calls.

Flop: (8.40 SB) 4[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">Hero bets</font>, UTG calls, UTG+2 calls, MP2 folds.

Turn: (5.70 BB) K[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets</font>, UTG calls, UTG+2 calls.

River: (8.70 BB) 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
Hero...

I felt worried and started to think what they would call the turn with that i beat. Should i still bet the river ? Should i have bet the turn ?