Are you sure she was broody? I know it seems like a no-brainer but maybe she was sick before and you just thought she was broody? How old was she?
I'm sure she was broody. She'd been there a couple days and doing the brrrk, brrrk, noise running around like they do. I've had so many I know the sounds and ritual they go through. The EE was there this morning and I'm debating on giving her BR eggs or hoping if I just keep taking her eggs she'll give up.