PokerStars No-Limit Hold'em, $1.00 BB (8 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

BB ($101.05)
UTG ($130.40)
UTG+1 ($119.40)
MP1 ($16.50)
Hero ($104.95)
CO ($38.50)
Button ($17)
SB ($68.35)

Preflop: Hero is MP2 with 7, A.
3 folds, Hero raises to $4, 2 folds, SB calls $3.50, 1 fold.

Flop: ($9) 5, T, 3 (2 players)
SB checks, Hero checks.

Turn: ($9) 8 (2 players)
SB checks, Hero bets $6, SB calls $6.

River: ($21) K (2 players)
SB checks, Hero ...

No reads. Is this a good or bad spot to take another stab at the pot?