Flopped straight, turn devalues

[sharpie]

Sorry for the very n00bish hand. It seems if I make a standard turn bet I'm commited? How much equity do I have when it gets all in? Is there any merit to inducing a bluff or am I overthinking this?

PokerStars No-Limit Hold'em, $1.00 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

BB ($98.30)
UTG ($165.35)
MP ($321.40)
Button ($100)
Hero ($105.45)

Preflop: Hero is SB with 8[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/club.gif[/img].
<font color="#666666">3 folds</font>, <font color="#CC3333">Hero raises to $3</font>, BB calls $2.

Flop: ($6) 6[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $5</font>, BB calls $5.

Turn: ($16) 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero???