river donk?

[poker1O1]

unknown villian
Party Poker (7 handed) converter

Preflop: Hero is UTG with A[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/club.gif[/img].
I raise, UTG+1 calls, BB calls

Flop: 8[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, I bet, villian calls, BB folds.

Turn: 9[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, villian bets, hero calls

River: K[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
I bet, villian folds.

Final Pot:
should I have bet this turn to better know where I'm at?