NL10 awkward spot w/ turned top pair OOP in 3bet pot

[youngmachetes]

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

SB: $15.05
Hero (BB): $10
UTG: $9.55
MP: $14.55
CO: $12.90
BTN: $10.95

Pre-Flop: Q[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/spade.gif[/img] dealt to Hero (BB)
3 folds, <font color="red">BTN raises to $0.40</font>, SB folds, <font color="red">Hero raises to $1.30</font>, BTN calls $0.90

Flop: ($2.65) 9[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $1.65</font>, BTN calls $1.65

Turn: ($5.95) A[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, <font color="red">BTN bets $3</font>, Hero folds

Results: $5.95 Pot ($5.95 Rake)


villain is unknown. is my line okay? if not, should i get it in on the turn or call/fold, call/call?