$5 How should I play bottom 2 when raised on the flop?

[Turlock]

PokerStars No-Limit Hold'em Tourney, Big Blind is t20 (9 handed)

Button (t1500)
SB (t1500)
Hero (t1500)
UTG (t1500)
UTG+1 (t1500)
MP1 (t1500)
MP2 (t1500)
MP3 (t1500)
CO (t1500)

Preflop: Hero is BB with 4[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/club.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls t20, MP1 calls t20, <font color="#666666">3 folds</font>, Button calls t20, SB completes, Hero checks.

Flop: (t100) K[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, <font color="#CC3333">Hero bets t80</font>, <font color="#CC3333">UTG+1 raises to t160</font>, MP1 folds, Button folds, SB folds, Hero calls t80.

Turn: (t420) Q[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">UTG+1 bets t140</font>, Hero calls t140.

River: (t700) J[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">UTG+1 bets t200</font>, Hero calls t200.

Final Pot: t1100

I murdered this I know,but should I have reraised big on the flop or bet big on the turn?
I find 2 small pair hard to play,what's the normal way of playing?