My period was a week late then when it came it was weird and is lasting longer than usual. Last time something similar happened was April of last year and I didn't get my periods for months after that. Same thing happened in September and lasted til early October then periods disappeared for months again and now I fear its doing it again. Last April I had started taking Prenatals and this time I recently started taking Geritol. Do you think its the vitamins that causes this to keep happening? In September I.wasn't taking anything but Early October got put on Provera for five days and period ended up lasting longer just like September, April, and Now. Any idea what's happening? It's frustrating.