2 pair facing difficult call on the turn

[KCrow]

I was somewhat unsure of what to do here. I have no history on the villan as they've just sat down on the table. I see my options as either folding or pushing......a call puts almost half my stack in.

Your thoughts...........

Pacific Poker
No Limit Holdem Ring game
Blinds: $0.25/$0.5
5 players
Converter

Stack sizes:
UTG: $33.55
CO: $91.7
Button: $56.5
SB: $51.72
Hero: $35.9

Pre-flop: (5 players) Hero is BB with 9[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/spade.gif[/img]
3 folds, SB calls, <font color="#cc0000">Hero raises to $1</font>, SB calls.

Flop: 3[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/diamond.gif[/img] ($2, 2 players)
SB checks, <font color="#cc0000">Hero bets $2.1</font>, <font color="#cc0000">SB raises to $5.7</font>, Hero calls.

Turn: Q[img]/images/graemlins/heart.gif[/img] ($13.4, 2 players)
<font color="#cc0000">SB bets $11</font>,