When to start new pack of birth control

Patient: I just started taking birth control and my doctor told me to immediately start so i began taking the pill on a Thursday vs a sunday, and i am expecting to get my period in two days, therefore i wont have it while im taking the sugar pill. my question is because i started on a thursday, do i go back to the beggning of the pack and finish the real pills first then go onto the sugar pills, or continue down to the sugar pills then go back to the start of the pack, finish the sunday-wed and then start a new pack?

Symptoms: None

Doctor: