Welcome to Healthcare magic,
Hope you have taken your rest of the pills on time. See, these pills contain hormones which support the uterine lining & prevent it from shedding. If you skip pills then this support is breached & you may experience abnormal bleeding. This is not necessarily seen in all women. In addition missing pills also increase chances of failure of your birth control.
So, In the current situation my advise is you should repeat the pregnancy
test (preferably a blood test
) if you are late with your expected periods. If negative you may start the new pack on time. The bleeding will settle with time. If not you should see a gynecologist.
If pregnancy test is positive you should not start the new pack & consult a gynecologist.
I hope I have given you the desired response. Take care.