weak top pair

[neeeel]

Hero is in the SB with 9[img]/images/graemlins/club.gif[/img] 8[img]/images/graemlins/heart.gif[/img]

preflop
UTG folds, UTG + 1 calls, 1 fold, MP1 calls, MP2 calls, 3 folds, Hero completes, BB checks

flop comes 8[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/diamond.gif[/img] 4[img]/images/graemlins/club.gif[/img]
Hero checks, BB checks, UTG + 1 bets, MP1 folds, MP2 calls, <font color="red"> Hero raises </font> ,BB folds, <font color="red"> UTG + 1 3-bets </font>, MP2 folds, Hero calls

turn comes 7[img]/images/graemlins/heart.gif[/img]
Hero checks, UTG + 1 bets, Hero folds

Comments please.
Preflop is maybe a bit loose, but theres a few ppl in , and its only costing me half a SB.
On the flop, I am never sure wether to donk if there has been no preflop raise, and i connect with the flop, admittedly my hand here is very weak, should i have just check folded?
I generally do bet out if i have top or mid pair with a decent kicker, and there was no preflop raise, i felt i would rather see what other people did this time
what do people think about the check raise? I wanted to get the BB to fold, and see how much villain liked his hand, is this just a waste of money?
I was tempted to fold after the 3-bet, but called and folded the turn UI