Don't cry but remember that we humans don't know doodley squat about hatching chicks and that shows up when you allow your hen to sit on only 4 eggs, the rest is downhill from there.
Allow your hens to go broody in a good nest box with a roof that can be TOTALY closed off incase you decide to move her. This box should be resting on the Earth and as a base there should be a chunk of turf inside to provide humidity for the hatching eggs.
Resist moving your chicks, the brooding hens, or their nest for any reason. Especially resist that urge to involve your self in the birthing of baby chicks. Even at 70 years young I still don't consider myself a qualified chick midwife and IMHO neither should you.
Everyone wants to "enjoy" free range poultry but the first thing most do is to begin free ranging by trying to help chicks hatch that for what ever reason are to weak to do so themselves. That's a bad start. You may should call it counting your chickens before they hatch.
Feed a good commercial grade laying pellet, and keep your hens and roosters fit and trimt. Fat roosters don't fertilize very many eggs and fat hens have a difficult time laying any eggs.
Next (and maybe most importantly) teach yourself how to properly gather, mark, store, and incubate your eggs.
Handle them (the eggs) genteelly and only once with clean hands both before they go into the incubator,
Candle at about day #10 and discard all the bad eggs. Then if you wish to move the eggs to a hatcher do so 9 or 10 days later. By all means keep the door shut on your incubator until after 23 days have PASSED. Do this regardless of all the peeping noises you hear coming from inside your incubator or even
from beneath your brood hen. Live baby chickens IMHO are much prettier than stiff, cold baby, dead, chickens. So don't handle your peeps to death.
By now your brood hen, nest box and all should be in a natal pen where the hen and her chicks can get acquainted or bond for a few days before they are introduced to the flock.
Look back at the prior posts and you will be floored by how many previous posts there are about hens that someone thought that a varmint had run off with only for the hen to turn up a little over 3 weeks later with a dozen or so biddies in tow. In fact I seem to remember one in the last few days.
Finally for only 7 dollars and change you can buy this little book and study it carefully.
https://www.mcmurrayhatchery.com/guide_to_better_hatching.html