What is this tonsil problem!

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Recently my housemate has been dealing with something similar to tonsiliths or tonsil stones, but more holes seem to have appeared in her tonsil.
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Now she’s dealing with material collecting in the holes each day, but it’s never occurred before. She’s been gargling with salt water and Listerine every day. What concerns her most is that this issue is isolated to one tonsil. Tonsil Crypts seem common and natural, but is this something to be worried about?
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She has an appointment with her dentist in December.

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Timeline:
– Sore throat 2 weeks ago
– First instance of material from tonsils removed 1.5 week ago
– More holes appear 1 week ago?
– continuous new “stones”