What's my move here?

[eDoNkStEr]

Party Poker No-Limit Hold'em, $2 BB (6 handed) Hand History converter Courtesy of PokerZion.com

BB ($381.80)
UTG ($169.82)
MP ($132.15)
CO ($120.61)
Hero ($170.90)
SB ($218.35)

Preflop: Hero is Button with 8[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/spade.gif[/img].
<font color="#666666">2 folds</font>, CO calls $2, <font color="#CC3333">Hero raises to $7</font>, <font color="#CC3333">SB raises to $25</font>, <font color="#666666">1 fold</font>, CO folds, Hero calls $18.

Flop: ($54) 3[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets $38</font>, Hero ........?????????


What's an appropriate move for this situation and why? I was think AK AQ on this hand? Opponent seems to play strong hands really aggressively. What should I do in this spot and an in depth analysis of this hand would be great if anyone can help me out?? THanks