How should u play this?

PokerStars 1/2 Hold'em (6 handed) converter

Preflop: Hero is MP with Q[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/spade.gif[/img].
UTG calls, <font color="#CC3333">Hero raises</font>, <font color="#666666">2 folds</font>, SB calls, BB calls, UTG folds.

Flop: (7 SB) Q[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets</font>, BB folds, <font color="#CC3333">Hero raises</font>, SB calls.

Correct to raise? Or should i raise maybe later at turn?

Turn: (5.50 BB) 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, SB calls.
Because i raised the flop, should I check or bet here?

River: (7.50 BB) A[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets</font>, Hero calls.
Is it better then to fold here?

Final Pot: 9.50 BB