Sounds like it might be the BB shell indeed.
But BB cups are made of soft thin lightweight aluminium, so it be surprised if they were capable of prising open a slightly cracked BB shell.
Ride around some more, agressiveley on bumpy roads (but somewhere safe for a crash) and see if it comes back.
@DFP started
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Sounds like it might be the BB shell indeed.
But BB cups are made of soft thin lightweight aluminium, so it be surprised if they were capable of prising open a slightly cracked BB shell.
Ride around some more, agressiveley on bumpy roads (but somewhere safe for a crash) and see if it comes back.