Bad push?

[ilya]

$10+1 Party SnG, level 1. I have T870 in UTG+1, UTG has T800. I have 99. UTG calls, I call, minraise in middle position, 3 cold calls, UTG calls, I call.

Flop is 9c3h6c.

UTG min bets. I raise the pot. Everyone folds to UTG, who calls.

Turn is Qc, making a flush possible. UTG checks. My stack is 595, the pot is 525. I push.

This is fine!! ....Right?