well I didnt have any luck when my hen went broody. she started back in July and since our rooster was too young i found someone to loan me some eggs because i didnt need any more chicks well when 3 hatched out I gave them back to my friend and she continued to sit so I bought her 8 eggs for $2 and gave her 5 she is small and couldnt handled any more than that and I tookthe other 3 and hatched 2 out in a homemade incubator and Ms.Peeps hatched out 3 I gave her my 2 and she is so happy she has been off the nest for a week now being a good mama. I have a friend who has 2 that have been tring to sit since march!!! nothing else I tried helped but to get her some chicks good luck your not alone
did you check the eggs? Did you dispose of the eggs? Depends on what day you started counting from along with environmental conditions. I don't start counting until I know she has quit laying and decided to start holding tight and only leaving the nest once a day. Even at that, I just let nature run it's course. If it really is a failed hatch then you can keep removing her from the nest or section off a part of the pen so she cannot get back to the nest that she was on. Usually takes about 4 or 5 days for her to get back to normal.
If you haven't removed the eggs yet give it another couple of days. If it really is a failed hatch maybe you could get a few day-old chicks from somebody and slip them under her at night. She'll just keep sitting there until she "hatches" something or you take other measures--do a search on breaking a broody for more how-to information if you need to go that route. Good luck!