Oh okay, if the roosting bar then not likely broody. Poor thing. She doesn't feel safe outside alone.
Well, you can buy chicks if you're set up to brood them yourself, or if you can afford it, buy pullets from a clean hatchery. You'll still have to go through a "see no touch" integration. You might have to do a quarantine period too esp. if you obtain privately.
Good luck! Sorry you're in this situation. Some people take their lone chicken inside with them at least to provide company, while they figure out next steps.