When Should I Take Noriday?

I am on the noriday pill, this is my 3rd cycle. I had my period and on day 12 of my cycle I had bleeding again which lasted for 5 days, now I am confused to when my period will be due as I have had two period this months, do I go by the dates of the second period to figure out when my period will be due again. I take the pill everyday at the same time.