Someone help please..my chickens eggs havn't hatched yet and it's been one week past the 21...?

I agree. Chickens full of progesterone will sit and sit and sit.. sometimes i scatter food close enough for the hens to peck at it while they're sitting. But if it's already been a week past the 21, they are done. You can hold an egg up to a light to make sure, but the only way to make her stop sitting is to toss the eggs.