Full Tilt No-Limit Hold'em, $0.50 BB (9 handed) Full-Tilt Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

BB ($82)
UTG ($20)
UTG+1 ($45.60)
MP1 ($53.25)
MP2 ($47.30)
MP3 ($11.25)
CO ($60.95)
Button ($71.25)
Hero ($52.30)

Preflop: Hero is SB with 5, 4.
3 folds, MP2 calls $0.50, 1 fold, CO calls $0.50, Button calls $0.50, Hero completes, BB raises to $3.5, MP2 calls $2.50, CO calls $2.50, Button folds, Hero calls $2.50.

Flop: ($13) Q, 4, 4 (4 players)
Hero checks, BB checks, MP2 bets $3, CO raises to $10, Hero ...

No reads

Is this one of the rare times I should be seriously considering slowplaying, or should I just go ahead and raise it up again?