Can 'verapamil' Cause Delay In Menstrual Period?

Hi, I just started taking verapamil a week ago as a prevenative for migraines. I also take birth control Kariva. I wasn't warned of any impact that taking the 2 drugs could have. However on the pill I always get my period on Thursday or Friday. However it is Saturday night and I have still not gotten it which is very unusual. Could the drug intereaction of the verapamil be the result of this?