Tight spot for a baby set

[smizmiatch]

MP2 is semiloose-weak; button is loose-weak.
This is a tough hand to play from early position.
I checked the flop hoping for a check-raise, but with three people already in, I thought it better to wait for the turn.
The turn is definitely questionable. I could have bet it out. But I waited again because I was pretty sure someone would bet. A check-raise became appropriate when the button bet because he could have had anything and I want to improve my chances by driving out players behind me.
Criticisms? Thanks.

Party Poker 3/6 Hold'em (8 handed) converter

Preflop: Hero is SB with 3[img]/images/graemlins/spade.gif[/img], 3[img]/images/graemlins/club.gif[/img].
UTG calls, UTG+1 calls, <font color="#666666">1 fold</font>, MP2 calls, <font color="#666666">1 fold</font>, Button calls, Hero completes, BB checks.

Flop: (6 SB) A[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/club.gif[/img], 3[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(6 players)</font>
Hero checks, BB checks, UTG checks, <font color="#CC3333">UTG+1 bets</font>, MP2 calls, Button calls, Hero calls, BB folds, UTG calls.

Turn: (5.50 BB) 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(5 players)</font>
Hero checks, UTG checks, UTG+1 checks, MP2 checks, <font color="#CC3333">Button bets</font>, <font color="#CC3333">Hero raises</font>, UTG folds, UTG+1 folds, MP2 calls, Button calls.

River: (11.50 BB) Q[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, MP2 checks, Button checks.

Final Pot: 11.50 BB