I started a new birth control this month, (Minastrin 24 Fe) and im not used to only having 4 days of inactive pills. I was so used to Sprintec previously (with a week of inactive pills). im on my 3rd day of my inactive pills and still no period, should I be concerned or is this normal? I've been taking it normally. And I started this pack the day I would have started a new Sprintec pack. So it's all normal, just a different medication that was started that day.