Bad spot for stop and go?

[TheJackal]

PokerStars No-Limit Hold'em Tourney, Big Blind is t1200 (9 handed) converter

MP1 (t8020)
MP2 (t14432)
MP3 (t34206)
CO (t3520)
Button (t1935)
Hero (t9383)
BB (t30941)
UTG (t13935)
UTG+1 (t10909)

Preflop: Hero is SB with K[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/heart.gif[/img].
<font color="#666666">3 folds</font>, <font color="#CC3333">MP2 raises to t3200</font>, <font color="#666666">3 folds</font>, Hero calls t2600, <font color="#666666">1 fold</font>.

Flop: (t6400) 6[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t6108 (All-In)</font>, MP2 calls t6108.

Turn: (t18616) Q[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

River: (t18616) K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

Final Pot: t18616

This guy had been pretty aggressive, I thought I might of had the best hand preflop, but if he had a weak ace, I was pretty sure he was calling me. I kind of made up my mind that if no ace came, I was pushing (on the flop).