Prenatals messing with Cycle?

When I took my prenatal vitamins the first time my period came 3 days late. Next cycle 5 days late. Then it regulated to a 28 day cycle. Then after I always forgot to take my prenatals. Like I took them only every second or third day. Now I started taking them constantly again. My period was due 2 days ago. Can prenatals really mess with the period??

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