Big pot blinding me?

[Spartan1983]

Just an average Pacific table. Little on the loose side, no maniacs.
Pacific $3/6 6 handed

Hero dealt 7 [img]/images/graemlins/spade.gif[/img]5 [img]/images/graemlins/spade.gif[/img] in BB

4 limpers, 1 fold, hero calls (5 SB's)

Flop: J [img]/images/graemlins/spade.gif[/img] 3 [img]/images/graemlins/club.gif[/img] T [img]/images/graemlins/spade.gif[/img]
Hero checks, Utg bets, Utg+1 raises, Mp cold calls, Co calls, Hero calls, Utg calls (7.5 BB's)

Turn: A [img]/images/graemlins/diamond.gif[/img]
Hero checks, Utg checks, Utg +1 bets, Mp calls, CO raises, Hero?