They have to investigate anything that doesn't sound quite right. Try not to worry too much though if you can help it. There's a very good chance that it could be nothing, or at the most, something not too serious. There are so many things it could be, but it's almost certainly not the worst thing you're thinking of.
I hope she's all fine in the end.
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Kind words are the music of the world. F. W. Faber
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