Can taking Vitamin B50 Complex cause me to skip a period?

So i have just started taking these vitamin B50 Complex pills, and i just missed my period for the month of June. I have been taking 2-3 a day with meals. Now usually i wouldn't worry about a missed period, but because i had unprotected sex on may 28, i am a little concerned. I am not on the pill, ( used to be but haven't taken it for about 7 months, and all my previous period have still been regular). So im wondering if there is a possibility that the Vitamins could have an influence on my menstrual cycle, before i jump to any conclusions.