I'm not sure of the exact sequence of events. What day did incubation start? Did you collect all the eggs you want her to hatch and start them at the same time or did you gradually add eggs? How many eggs does she have, 20? I think the due date on some of the eggs was last Friday but I'm not sure how many..
Do not be afraid to take her off the nest and check the eggs. You will not break her from being broody doing that. Since you are probably past the due date be a bit careful picking her up. Baby chicks don't always peep so you may have some and not know it. Baby chicks sometimes crawl up under the hen's wings or other feathers. I crushed a chick once that was under the hen's wing when I picked her up. So gently slide your hand under her and lift her up. She may peck you so you might want to wear long sleeves.
If you have chicks all you should be doing is to have food and water on the coop floor where the chicks can get to them when she brings them off the nest. That's all I do, I leave the rest up to the broody hen. But I start all my eggs at the same time.
For the next time I'll tell you how I manage a broody, others will do it totally differently. When a hen goes broody I collect all the eggs I want her to hatch before starting any. A hen needs to be able to cover all the eggs, otherwise some can get pushed out, cool off, and die. They get pushed back under her and another gets pushed out to die. You usually don't get great hatches if she can't cover them all.
How many can a hen cover? It depends. I normally give a hen 12 eggs of the size she lays but I once had a hen that could only handle 10. Another time I had a hen hide a nest and come off with 18 chicks. I never did find her nest so I don't know how many she started with.
After I collect all the eggs I want her to have I mark the eggs with a black Sharpie. I draw circles around the egg, one the long way and one the short so I can tell at a glance which eggs belong. I start all of them at the same time.
Then every day after the others have finished laying I check under the broody hen to see if any eggs that don't belong showed up. Sometimes other hens will lay with the broody hen. If you remove those eggs daily they are still good to eat. That's all I do until she has chicks.
When she has chicks I put food and water on the coop floor where the chicks can get to it when she brings the chicks off the nest. Sometimes the hatches are over within 24 hours of the first one hatching. Some hatches drag out for more than two full days. I figure the hen knows what is going on better than I do so I let her decide when she wants to bring them off. When she does I clean out the nest.
I don't know what your coop looks like. Is it a nice big walk-in coop at ground level or is it a tiny elevated coop. That can dictate what your next steps should be. With my big walk-in coop I just stay out of the broody's way. She decides when to take them outside, usually two or three days later. At night she takes them to a corner of the coop floor where they spend the night. If you have one of those tiny elevated coops you may need be a lot more hands on.
I see you pasted while I was typing. I'll post this anyway and respond to your last post in another post.