NL50 - 666 monochrome board, turn and river get worse

[Triggerle]

This hand really left me totally unsure about everything. It's obvious that it isn't played well, but the only thing I know for sure is that we misplayed pre-flop.

Should we have donked the flop? Taken initiative on the turn?

What lines can we take here?

Poker Stars, $0.25/$0.50 NL Hold'em Cash Game, 5 Players
LeggoPoker.com - Hand History Converter

BTN: $46
Hero (SB): $123.35
BB: $34.05
UTG: $56.95
CO: $27.75

Pre-Flop: 6 6 dealt to Hero (SB)
UTG folds, CO calls $0.50, <font color="red">BTN raises to $1.50</font>, Hero calls $1.25, BB calls $1, CO calls $1

Flop: ($6) Q[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/spade.gif[/img] (4 Players)
Hero checks, BB checks, CO checks, BTN checks

Turn: ($6) 7 (4 Players)
Hero checks, BB checks, CO checks, BTN checks

River: ($6) 9[img]/images/graemlins/heart.gif[/img] (4 Players)
Hero checks, <font color="red">BB bets $1.50</font>, <font color="red">CO raises to $3</font>, BTN folds, Hero folds, BB calls $1.50