Alpha - the future is now!

[alpha99]

now a voicemail: Hiya Alpha, could you give me a call back as soon as you can please, it's important, thank you, bye.

She sounds subdued in her tone of voice. I can vaguely hear the kids in the background so I don't think they are in any serious trouble. Why not just say what is so important in the voicemail? I haven't returned her calls yet. I'm wondering what to do...wait a bit (a few hours etc), ignore her completely until she is more specific, or something else.

edit: I'm wondering whether when i do response if I should text 'what's the matter?' etc or call.