Oh, she's not feeling wellThank you so much for responding. The reason I thought something was wrong with her is that she was staying in the coop by herself. I felt her crop and it was empty and I could feel her breast bone. I brought her in three days ago and just yesterday her belly between her legs is hard and I thought it was an egg, but, it could be swelling instead. I don't know when the last time she laid an egg.
The antibiotic I gave her is some that the vet gave me for one of my ducks (she passed).
This morning when I checked on her, I saw three small poops. I smelt her breath and it doesn't smell sour. When I first brought her in she would peck at some bread and tomatoes but not her feed and now she wont even eat that. I am going to try to upload a picture, although I am not good at that.
Thank you again for your input.

Since you have not been able to feel an egg, she's not pooping much and she has a hard abdomen, likely she has a reproductive problem going on.
If you have vet care, they can perform an xray to see if there is a mass in the abdomen, but sadly, even if you see it there is not much that can be done.
If you do give her antibiotics, that may help with inflammation and give her some short term relief - just give her the correct dosage for the full course of treatment.
Sometimes all you can do is give them supportive care like you have been doing, give them a couple of days to see if they will perk back up.