You have a nut flush draw and a mid pair on the flop with A showing.

You put your opponent on an A. For example
Ks Ts
Ah 9d

Flop: As Th 2s

How do you play this type of a hand with and without position. I am always tossing in bed thinking is it better to play it very hard from the flop or just call and hope to hit one of your outs.