Defending in the BB

[VickreyAuction]

Villain in this hand was 27/20/2.5 over 700. His AttSteal was 38. I'm trying to defend more.

PokerStars 2/4 Hold'em (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is BB with 8[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">CO raises</font>, Button calls, <font color="#666666">1 fold</font>, Hero calls.

Flop: (6.50 SB) 9[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="#CC3333">CO bets</font>, Button calls, <font color="#CC3333">Hero raises</font>, <font color="#CC3333">CO 3-bets</font>, Button folds, Hero calls.

Turn: (6.75 BB) 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">CO bets</font>, Hero...

The only thing that I'm ahead of is a heart draw. He can also have an overpair, AQ, KQ, Q9 etc. My image was probably pretty bad (laggy) at this point, but I'm still checkraising the field on the flop. Should I fold the turn?