After completion of one packet after 3-4 days period starts but in your case as you told that you are still continue taking oral pills
e respective of you had period, or not.
In this condition you are not having period as pills are continued.
So best thing is that you stop taking pills and after stopping pills you will get period,this will give new date of your period and then on the fifth day you start new packet.
In this condition if you have any confusion pl take gynac opinion.