Is she eating and drinking? I am a newbie - but I had two hens hatch babies this spring, now I am currently trying to break a broody by putting her in a wire cage - it is not going real well - she is stubborn, but I don't want more chicks.
Maybe you should give her eggs to hatch, or get some day old chicks to put under her - or try to break her of broodiness. There are several methods if you search on this site to break a broody - but most say to put them in a wire cage - elevated, and give them no nesting material - just food and water.
I just know they don't lay eggs during that time, and it does take a toll on them over time.