Hi! Last Month I Interrupted Taking Belara Pills Due To

Hi! Last month I interrupted taking Belara pills due to vomiting for 4 days ( this wasn't because of pills - food actually) and my period came next day. My question is if I now start to take again pill in the first day of period as if one menstrual cycle passed and it takes effect from first day? Or can I start taking it now (period hasn't come yet) and use protection for 7 days?