Horrible Blind battle spew!

[Rounder 24/7]

Cryptologic 2.00/4.00 Hold'em <font color="#0000FF">(5 handed)</font> link

Preflop: Hero is SB with K[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/spade.gif[/img].
<font color="#666666">3 folds</font>, <font color="#CC3333">Hero raises</font>, BB calls.

Flop: (4.00 SB) 5[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, BB calls.

Turn: (3.00 BB) J[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, BB calls.

River: (5.00 BB) A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">BB bets</font>, Hero calls.

Final Pot: 7.00 BB.

Im assuming it's fine to bet out on any board when it's ss vs bb. But when that 3rd diamond hit's is that where I check/fold? ... by making the mistake on the turn I felt
I'd only bloated the pot and made a horrid crying call on the river. weak weak weak! Im hoping you're going to say .... check/fold the turn and be done with it. What would be the line to take if the turn gets checked behind me?