Bit of a problem, std or infection?

Had unprotected sex 6 days ago with a guy who told me hes been tested and gotten the all clear, and i felt fine until two days after when my labia started getting swollen and i realised that it was itchy down there. Today i noticed this, I'm really scared idk what to do please help thankyou

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you have thrush, grab some canetan cream and treat as neccessary.

sounds like a yeast infection