thank you for asking HCM
I have gone through your query. It is usual to get irregularities in menstrual cycle or a break through bleed when you suddenly stop contraceptive
pills. But if bleeding is more then better to go to ER.ultrasound
examination will be needed to find out the status of uterus
or a D & C might be needed to control the bleeding. Hope this may help you.
Let me know if you have any further queries.