AJo in a pot that is becoming big

[Str8Fish]

Party Poker 1.00/2.00 Hold'em <font color="#0000FF">(10 handed)</font> link

Preflop: Hero is MP3 with J[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 folds</font>, UTG+1 calls, <font color="#666666">2 folds</font>, MP2 calls, <font color="#CC3333">Hero raises</font>, <font color="#666666">2 folds</font>, SB calls, BB calls, UTG+1 calls, MP2 calls.

Flop: (10.00 SB) 4[img]/images/graemlins/club.gif[/img], 3[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, UTG+1 checks, <font color="#CC3333">MP2 bets</font>, <font color="#CC3333">Hero raises</font>, SB calls, BB calls, UTG+1 calls, <font color="#CC3333">MP2 3-bets</font>, Hero calls, SB calls, BB calls, UTG+1 calls.

Turn: (12.50 BB) T[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, UTG+1 checks, <font color="#CC3333">MP2 bets</font>, Hero folds, SB calls, BB calls, UTG+1 calls.

River: (16.50 BB) 9[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">BB bets</font>, UTG+1 folds, MP2 calls, SB calls.

Final Pot: 19.50 BB.

UTG+1 is an unknown
MP2 is a rock 19.51 VP$IP, 3.66 PFR, 0.81 AF
SB is an unknown
BB is LA-P 31.33 VP$IP, 5.58 PFR, 0.65 AF
The aggression factors include the PF numbers.

The pot was becoming huge. I know I was drawing to two overcards after the flop. I raised to see if I could eliminate the other players. As you can see, after that raise, the pot became HUGE. I feel like I should have either folded or just called on the flop. Any thoughts?