It is small, white, and round with a scored cross on the back as well.
Is it possible your pill comes from the UK? Your description matches Clonazepam 2 mg marketed by Auden McKenzie Limited.
Clonazepam 2 mg Tablets
Round white tablets with cross-score break line, marked ‘CLN 2’.
You will find info on clonazepam at https://www.drugs.com/clonazepam.html
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