When can I start a new pack of birth control, after having an early period due to emergency contraceptive?

Patient: When can I start a new pack of birth control, after having an early period due to emergency contraceptive?

Symptoms: Two months ago I stopped taking birth control. I took the plan B on day 10 of my cycle this month and started a new early period on what would have been day 16. My period ended mid-week and I would like to begin taking birth control again. Would I start it now?

Doctor:

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