AQs flops the nut flush draw

[octop]

I just got back from a 2 week Vegas trip where I did pretty well overall but this hand bothers me
2/5 NL at the Wynn my first orbit at the table
I have 475 ` and my opponents have me covered
One limper, I raise on the cutoff to 25 with AQ hearts, the blinds call and the limper folds.
Flop 346 2 hearts.
SB bets 50 BB calls I should..