sexing? can you do it early? and how?

So, the journal i have started .... is my first grow. I was so patient, well we were. A frind of mine and I started some seed and let them veg. for... 2.5 months? give or take a week or so... maybe it was more like three... anyway. they all turned out to be males. So heres the million dollar question.... can you sprout the seeds at 12/12 ( i have heard people do this although not reccomended) just to find the females, throw away the males and then put em back into veg?

I just want to know and get guarenteed at least one female, and no I don't have money for feminized seeds or i would just do that.....

oh and if it is possible to sex early and re-veg how would you do it?

you got unlucky with all males. I don't know how many plants you had but that's just unfortunate.
As for determining sex before flower, you can't do it.
12/12 from seed will just allow your plant to flower naturally when it has matured to that stage in it's life.
Flower and re veg? I haven't ever considered this. No idea but I don't think I would recommend it.
Why not veg for 4-5 weeks and flower 10 plants. Hopefully, you get 4 girls. Start taking clones as soon as you see pistils and those clones will be girls.

I think there is a way but im also a newbie so that probably doesnt help you at all. I would also like to know a definite answer to this question!

lol yeah there is a way. ive been doing for as long as i can remember. cut a smaller lower branch and leave it in water in a cup and put it by your window sill with no direct sunlight or thorugh it into your flower room and see what pops out. balls=male hairs=ladyy. then that will refect the entire plant that it came from

I've heard that females will typically have alternating nodes(meaning the pairs of branches growing of the main stem won't be directly across from each other, one will be slightly higher or lower than the other) and males won't. I'm not 100% sure about this but I know this was true with my last grow. I've also heard that females will have more leaves, like sets of 9,11, and 15, and males will have less, like 5 or 7. Again I don't know how true this is, just something I heard on here somewhere.