Flop with OK & FD4 - call or raise?

[Interested]

Hi all,

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

Preflop: Hero is Button with A[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/spade.gif[/img].
UTG calls, <font color="#666666">1 fold</font>, UTG+2 calls, MP1 calls, <font color="#666666">2 folds</font>, CO calls, Hero calls, SB completes, BB checks.

Flop: (7 SB) 4[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(7 players)</font>
SB checks, BB checks, UTG checks, UTG+2 checks, MP1 checks, <font color="#CC3333">CO bets</font>, Hero ?

I have to consider that this hand confused me [img]/images/graemlins/smile.gif[/img]
I'd just sat at this 35/10 table and this was my 3rd hand. No reads.
At one side pot is a bit big and I can raise - on the other I can get many callers and to raise on later streets using position and I tend to call. What do you guys think?

I know there was an option to raise pre-flop but I like when there are 5-6 limpers. Thoughts?