You have a broody hen! If you don't have a rooster you have to break her or else she wont lay eggs. If you do have a roo than congrats! You might end up with little chicks! If you want them...
Welcome to BYC!
I have 5 broody hens right now. One has pullets from Tractor Supply. I have a few eggs incubating for the rest.
I hadn't planned on letting them raise chicks this year, but they are so cute with their little ones.