Dear user, welcome to healthcare magic.
If you are taking your pills and you have sex this is protected not unprotected sex and over that your partner was using a condom. I think your chances of getting pregnant are very weak.
On the other hand it is not impossible so to make sure that you are not pregnant you can either wait another couple of days for menstruation
or have a bood hcg
Do not start the new pills unless you are sure that you are not pregnant (after menstruation)
Finally I wish you good luck.
Dr. Ahmed Bahaa.