Overplayed JJ in SB?

[carniplant]

Party Poker 2/4 Hold'em (10 handed) converter

Preflop: Hero is SB with J[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/heart.gif[/img].
UTG folds, UTG+1 calls, UTG+2 calls, MP1 calls, MP2 calls, MP3 folds, <font color="CC3333">CO raises</font>, Button folds, <font color="CC3333">Hero 3-bets</font>, BB calls, UTG+1 calls, UTG+2 calls, MP1 calls, MP2 folds, <font color="CC3333">CO caps</font>, Hero calls, BB calls, UTG+1 calls, UTG+2 calls, MP1 calls.

Flop: (25 SB) 9[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/spade.gif[/img], 3[img]/images/graemlins/heart.gif[/img] <font color="blue">(6 players)</font>
Hero checks, BB checks, UTG+1 checks, UTG+2 checks, MP1 checks, <font color="CC3333">CO bets</font>, Hero calls, BB calls, UTG+1 calls, UTG+2 calls, MP1 calls.

Turn: (15.50 BB) 4[img]/images/graemlins/heart.gif[/img] <font color="blue">(6 players)</font>
Hero checks, BB checks, UTG+1 checks, UTG+2 folds, MP1 checks, <font color="CC3333">CO bets</font>, <font color="CC3333">Hero raises</font>, BB folds, UTG+1 folds, MP1 calls, <font color="CC3333">CO 3-bets</font>, Hero calls, MP1 calls.

River: (24.50 BB) 4[img]/images/graemlins/club.gif[/img] <font color="blue">(3 players)</font>
Hero checks, MP1 checks, <font color="CC3333">CO bets</font>, Hero calls, MP1 calls.

Final Pot: 27.50 BB
<font color="green">Main Pot: 27.50 BB, between CO, Hero and MP1.</font>

After CO(who seems o.k so far) caps it with that many cold-callers i'm not feeling too good about my hand vs his hand range , I decide to wait t'ill turn to try and protect my hand because the pot is already huge, when CO 3bets the turn i'm feelling pretty sick about my chances(mp is a usual calling station so not worried about him), anywhere i shoudl fold this?