FALSE positive from digital?

Hi ladies! I took a Clear blue digital Thursday and it was BFN. (FMU) then Saturday I woke up and did the same using FMU. It says BFP! I've lost 3 children in the past so I am super paranoid and anxious. So i wake up today (about 45 minutes ago) and took my last Digital clear blue test. It says BFN! Is this a false positive? Or What?

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