Is this an acceptable line? 88 200nl

[Weir]

PokerStars No-Limit Hold'em, $2 BB (6 handed) pokerhand.org hand converter

Button ($242.65)
Hero ($210.75)
BB ($478.80)
UTG ($258.20)
MP ($134.25)
CO ($252.75)

Preflop: Hero is SB with 8[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">CO raises to $8</font>, <font color="#666666">1 fold</font>, Hero calls $7, <font color="#666666">1 fold</font>.

Flop: ($18) 5[img]/images/graemlins/diamond.gif[/img], 3[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">CO bets $12</font>, Hero calls $12.

Turn: ($42) T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $24</font>,


Guy is 26/18. I never know what to do in spots like this, where I think I am probably best, but am OOP.

Is check/raising the flop bad?
Is donk turn bet ok?
should i bet more on the turn? i don't really want to waste more $ on the turn if i am beat.