Taking an early edge or having an early night?

[transmitt]

Third stage during the first hour, starting stacks at 1000, I'm at ~1,350 when this hand comes up; villian on the button has ~800. Per the subject, did I play this poorly?

Antes at 25/50. I'm in the CO w/ As 5s, 1 MP limper, I limp, button limps, both blinds are in as well. Flop comes 5c Ac 7s. MP checks, I bet 125 into the 250 pot. button calls, both blinds fold, MP folds. Turn comes 6s. With the pot at 500, I have 2 pair w/ the nut flush draw and push... Comments on all streets appreciated.