Mirena Bleeding - 2 weeks early ?

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I got my Mirena 2 weeks ago (04/09) on day 4 out of 5 of my period & I’ve had tiny bits of spotting ever since. But just now when I went to the bathroom I’m spotting but there’s enough blood there to make me think I’ve started my period again. I’m not due for AF for another 13 days. Is this normal?