2/4 NL, Top 2 facing river raise

[Tokyo!!]

No reads, only like 5 hands in. I couldn't figure out what I beat, except a bluff, which I figured was unlikely due to the context of the board (I'm playing like it hit me). Standard or bad fold? I have like $200 after betting river.

PokerStars No-Limit Hold'em, $4 BB (4 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Button ($191.30)
Hero ($399.40)
BB ($544.15)
UTG ($200)

Preflop: Hero is SB with A[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/spade.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to $16</font>, BB calls $12.

Flop: ($32) Q[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $22</font>, BB calls $22.

Turn: ($76) A[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $48</font>, BB calls $48.

River: ($172) 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $112</font>, <font color="#CC3333">BB raises to $458.15</font>, Hero folds.

Final Pot: $742.15