Just knocked out in a tournament the play was AQ Suited Spades. I bet pre flop in the big too 900. The blinds were 3-600 BB ante. So I'm in for 1500 with 8k left. SB calls everyone else out. Flop. Q 8 4. I have the nut flush draw and top pair top kicker. Man calls my all in says he flopped two pair. And I run out x x on the turn and river. What did I do wrong? Any advice?