1/45 A on turn might have me behind--what to do?

[Ninth Prince]

Okay, when both guys call my raise and then an ace comes on the turn I'm thinking I may be in trouble. BB checks to me. What's a good way to handle this situation? Thanks.

PokerStars No-Limit Hold'em Tourney, Big Blind is t200 (9 handed) internettexasholdem.com

UTG+1 (t470)
MP1 (t1755)
MP2 (t4741)
Hero (t1990)
CO (t6335)
Button (t3765)
SB (t5662)
BB (t11750)
UTG (t3075)

Preflop: Hero is MP3 with J[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/heart.gif[/img].
<font color="#666666">4 folds</font>, Hero calls t200, <font color="#666666">1 fold</font>, Button calls t200, SB completes, BB checks.

Flop: (t800) J[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">BB bets t200</font>, <font color="#CC3333">Hero raises to t600</font>, Button calls t600, SB folds, BB calls t400.

Turn: (t2600) A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, Hero ?