Raising War with KQs in the SB

[pjcmt]

New to the game so no specific reads but the PokerTracker data is as follows:
BB: 22/15/4 after 178 hands
MP2: 56/1.3/0.7 after 77 hands
CO: 39/34/0.7 after 494 hands
Button: 44/14/1 after 190 hands

Planned to check raise on the turn but it got a little wild...

Full Tilt 0.50/1 Hold'em (8 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is SB with Q[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/spade.gif[/img].
<font color="#666666">3 folds</font>, MP2 calls, CO calls, <font color="#CC3333">Button raises</font>, Hero calls, <font color="#CC3333">BB 3-bets</font>, MP2 calls, CO calls, Button calls, Hero calls.

Flop: (16 SB) 6[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(5 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">BB raises</font>, MP2 calls, CO calls, Button calls, Hero calls.

Turn: (13 BB) J[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(5 players)</font>
Hero checks, <font color="#CC3333">BB bets</font>, MP2 calls, <font color="#CC3333">CO raises</font>, Button folds, Hero calls, BB calls, <font color="#CC3333">MP2 3-bets $3.7 (All-In)</font>, <font color="#CC3333">CO caps</font>, Hero calls, BB calls.

River: (29.80 BB) 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players, 1 all-in)</font>
Hero checks, BB checks, <font color="#CC3333">CO bets</font>, Hero...?

Any feedback on the way the hand was played and should Hero call the river given the size of the pot?