FUBAR with 77

[wrto4556]

10/20 (6 handed)

I get delt 7 [img]/images/graemlins/heart.gif[/img],7 [img]/images/graemlins/club.gif[/img] on the button.

MP opens (decent player), a new CO cold calls, as do I, and the BB (a little LAGGY) comes along.

flop is 8 [img]/images/graemlins/heart.gif[/img],6 [img]/images/graemlins/heart.gif[/img],2 [img]/images/graemlins/club.gif[/img]
BB leads out, MP raises, CO folds, I call, BB calls.

turn is 6 [img]/images/graemlins/club.gif[/img]
BB checks, MP bets, I raise...

planning on taking the free showdown or folding to a 3-bet.

Should I be calling preflop...what about the flop?