Flopped Flush w/ OESFD

[Cunning Linguist]

I just converted to ring from single table tournies, aka the land of push/fold, so postflop play is a foreign concept to me.

I sat down at the table less than 10 hands before this one occured.

Party Poker (7 handed) converter

Preflop: Hero is CO with 7[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/heart.gif[/img].
<font color="#666666">5 folds</font>, BB checks.

Flop: 6[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
RufusPNewman bets [$2].
MarxStalenin raises [$4].
RufusPNewman raises [$6].
MarxStalenin calls [$4].
(Sorry for the formatting. The converter wasn't cooperating.)

Turn: A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks.... <font color="red"> Hero..? </font>


Should I have raised again on the flop?
Should I check behind after a scary Ah on the turn or keep betting?