QQ in blind war - How's my line?

25NL
10 players

Stack sizes:
UTG: $28.75
UTG+1: $10.90
UTG+2: $23.00
MP1: $34.25
MP2: $89.00
MP3: $24.35
CO: $24.60
Button: $16.10
Hero: $24.35
BB: $24.40

Pre-flop: (10 players) Hero is SB with http://www.neildewhurst.com/wp-conte...c-cards/qc.png http://www.neildewhurst.com/wp-conte...c-cards/qs.png
8 folds, Hero raises to $1.15, BB calls.

Flop: http://www.neildewhurst.com/wp-conte...c-cards/8h.png http://www.neildewhurst.com/wp-conte...c-cards/4c.png http://www.neildewhurst.com/wp-conte...c-cards/9s.png ($2.30, 2 players)
Hero bets $1.85, BB raises to $3.7, Hero calls.

Turn: http://www.neildewhurst.com/wp-conte...c-cards/5h.png ($9.7, 2 players)
Hero checks, BB bets $2.5, Hero raises all-in $19.5