Suggest The Dosage Of Birth Control Pills After Missing 2 Doses

I was just prescribed the birth control, Natazia. (I was previously on Loestrin Fe for a year and a half) My period began on Wednesday, but the the directions for Natazia say to take it on the first day of your period. (So I have missed two days of pills) Should I begin on day 1 of the pills right now although today is not the first day of my period or should I follow the instructions on the pack for if you have missed two pills? It seems like the hormone levels change quite often in this birth control, so I don t want to mess up when to first take it since it is a new prescription for me.