Implantation bleeding occurs around 10 days after ovulation or in other words a week to a few days before period. If you have bleeding after due date of your period then it is not implantation bleeding but can be spotting or irregular period.
However, you can take blood pregnancy test now to rule out any doubt in your mind. You should also take advice of the doctor.
However, you can take blood pregnancy test now to rule out any doubt in your mind. You should also take advice of the doctor.