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A delay of 3-4 days or even a week can be normal and it can be due to hormonal
problems;anaemia;and if you are sexually active then the delay or absence can be due to pregnancy
.Since you are having dizziness;slight nausea
please see if you are sexually active and if you are then you get a urine pregnancy test done with first morning sample of urine to rule out pregnancy and if you are not sexually active then the dizziness can be a side effect of the patch also.So please get tested.