sexing male/female

my plant has been under 12/12 light for about a week now and it still has not shown its sex how much longer should i have to wait to see if its a female or male are there ways to make it show sex faster

Yes. You can give it extra Potassium. Most plants will respond to getting large amounts of K by preflowering, even during veg.

Make sure there are no light leaks at night.