Villain is completely unknown. Not worried about the PFR.

Full Tilt No-Limit Hold'em, $4 BB (6 handed) Full-Tilt Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

CO ($400)
Hero ($400)
SB ($800)
BB ($400)
UTG ($1007.50)
MP ($849)

Preflop: Hero is Button with 8, 8. CO posts a blind of $4.
1 fold, MP raises to $18, CO (poster) calls $14, Hero calls $18, 2 folds.

Flop: ($60) 3, 4, 6 (3 players)
MP checks, CO bets $60, Hero...

Am I a wuss for wanting to just fold here?