When do you become concerned about menstral spotting after your 7 day period?

When does it become a concern to have spotting when your period has lasted 7 days and still spotting on the 9th day... Have never had this happen before, usually at max a 5 day period, and never any spotting afterward??When do you become concerned about menstral spotting after your 7 day period?
i personally would go see a doctor and have him/her to check it out as that is very disturbing and not normal in most cases.
Mom of B & D
this happens to me too
I would see your Gyn. Spotting like that is not normal.