Overpair faces aggression on flop

[JPeezy55]

Villain is an unknown.

I'm running 14/12.

I was very confused in this hand. Comments on all streets welcome. Thanks.

PokerStars No-Limit Hold'em, $0.50 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP ($28.80)
Button ($142.25)
SB ($7.50)
BB ($62.05)
Hero ($55.10)

Preflop: Hero is UTG with 9[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/heart.gif[/img].
<font color="#CC3333">Hero raises to $2</font>, MP calls $2, <font color="#666666">1 fold</font>, SB calls $1.75, <font color="#666666">1 fold</font>.

Flop: ($6.50) 8[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets $4.5</font>, <font color="#CC3333">MP raises to $10</font>, SB folds, Hero calls $5.50.

Turn: ($26.50) T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $39</font>, MP calls $16.80 (All-In).

River: ($60.10) A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

Final Pot: $60.10

[whyzze]

he is half stack...3bai on flop

[wooziephantom]

Yep, just put it in on the flop... What did he hold?

[JPeezy55]

He had 86 of spades.

[BevillTheDevil]

push or fold flop, last thing i wanta do is call and him hit his draw (probably a significant part of his range) on the turn.