Thanks for the query.
Taking the contraceptive
pills regularly at same time every day can give good protection towards pregnancy
Even if you miss the exact time, if you take the pill within 24 hours, usually that will give protection.
So possibly you will get the withdrawal bleeding soon.
Wait for 4 more days.
If you do not get withdrawal bleeding even after 4 days, go for blood test
for pregnancy once.
If the test comes negative, no need to worry and can continue with next pack.
If the test comes positive, and if you want to terminate the pregnancy, consult gynecologist and follow her advice.