Hey man sorry about your plants, it is hard to accept that it is not everything you wanted, but 2/4 of my plants turned out to be male as best to my knowledge. They say 50% of seeds are female and when you buy feminized seeds some 80% are female.. next time to be sure plant a few more than you wanted to in case you have to toss a plan or two cause it turned out to be male. I am also adding the first preflower i noticed on my first female, also keep an eye on your crop wheny ou are growing just in case a male does sneak in under the radar (in the very early stages they look like balls opposed to the pictures i am about to show you)
As you notice the two white hairs(pistils) coming out of the little preflower there, that is the early stages of a female, if there are males among your females your males qwill polenate them and you will have a seedy harvest, Goodluck to you and your growing