Opp is 5/0 over a small number of hands (20). Call the turn again and try to get another bluff out of opp or raise here?

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $0.10/$0.25
9 players
Converter

Stack sizes:
UTG: $59.90
UTG+1: $7.95
MP1: $6.55
Hero: $24.55
MP3: $25.60
Button: $24.20
SB: $56.55
BB: $26.55

Pre-flop: (9 players) Hero is MP2 with 5 5
UTG calls, UTG+1 raises to $0.5, MP1 folds, Hero calls, MP3 calls, Button folds, SB calls, BB calls, UTG calls.

Flop: T 5 4 ($3, 7 players)
SB bets $2.5, 3 folds, Hero calls.

Turn: 2 ($8, 3 players)
SB bets $5.5, Hero raises to $11