Hi,
Welcome to ehealthforum,
You should consider checking with your pharmacy about the dosage of both the pill packs (the old and the new one). If the dosages of the active pills remain the same, then you can continue to use this pack, or you can consider using this pack as instructed, and get started on the regular one once you finish with this. You can also consider discussing about this with your treating doctor/gynecologist and proceed as per the instructions given.
Take care.