My flock is 23 weeks and nobody has started laying yet.
I think the squats I've been seeing have been nothing but a tease. They are such little brats, lol!
Be patient. Day length is increasing, and they are approaching the right age.
I know. I'm impatiently waiting as patiently as I can, lol.
I'm going out of town this weekend, hopefully that will help get my mind off it. At least for a little bit.