If you could move her to an area separated from the flock, but with enough room for her to get up on her own and eat, drink and poop, that would be good since she can't seem to find her way back to her eggs on her own. Are you watching her 24/7? She may get up on her own to do her thing when you're not watching. Broodies like to be secretive, getting off the nest when they think no one is looking. I'm pretty hands off with my broodies. I have never had one starve herself while setting.