Fold, call or raise?

[Enon]

MP3 is fairly loose aggressive (32/15/2) and BB is even more laggish (40/20/2.5)

I'm a fairly tight player in this game (16/11/2) and feel like I've been run over today, but I'm not sure anyone has noticed yet.

Party Poker 30/60 Hold'em (10 handed) converter

Preflop: Enon is Button with 5[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/club.gif[/img].
<font color="#666666">3 folds</font>, MP1 calls, MP2 calls, MP3 calls, <font color="#666666">1 fold</font>, Enon calls, SB completes, BB checks.

Flop: (6 SB) Q[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/diamond.gif[/img], 3[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(6 players)</font>
SB checks, BB checks, MP1 checks, MP2 checks, <font color="#CC3333">MP3 bets</font>, Enon calls, SB calls, BB folds, MP1 folds, MP2 folds.

Turn: (4.50 BB) 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, MP3 checks, <font color="#CC3333">Enon bets</font>, SB calls, MP3 calls.

River: (7.50 BB) K[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">MP3 bets</font>, Enon ?