$50 6 max, strong draw against complete unknown

[gp?]

i posted in the BB and then this happened when I was SB. What's the standard line against an unknown?
Party Poker No-Limit Hold'em, $ BB (6 max, 4 handed) FTR converter on zerodivide.cx

UTG ($163.93)
Button ($89.85)
Hero ($49.50)
BB ($22.13)

Preflop: Hero is SB with J[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/heart.gif[/img]. Hero posts a blind of $0.25.
UTG calls $0.50, <font color="#CC3333">Button raises to $1</font>, Hero (poster) calls $0.75, BB calls $0.50, UTG calls $0.50.

Flop: ($4) 8[img]/images/graemlins/spade.gif[/img], 2[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">Hero bets $3</font>, BB folds, <font color="#CC3333">UTG raises to $6</font>

I think betting flop is good, but do i try to put more in, or just call and wait to hit?