Should I believe my boyfriend?

my boyfriend and I were eating and he got a text from a unknown number saying “ I know where you at where’s my money “. I wasn’t near him so I’m not sure if it was a unknown number and what exactly was said on that text but when I told him what it was he said , a random number text him and he was quick to Delete it. It made me feel uncomfortable because he delete it right away and he gets defensive when I asked him if he sure it wasn’t for him.

Should I believe my boyfriend?
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