The blood from a menstrual cycle is much darker than that of fresh blood. If the blood is bright red it is more likely vaginal bleeding and not just your period.. When things seem unusual for you or concern you the fist thing you should do is see a doctor as soon as you can and if you can't afford it there are places like health departments that go by income...
Periods normally last over a 7 day period if even that long if it lasts longer then that you may have something wrong and it would be good if you went to see a doctor
Periods happen periodically . If the bleeding goes on for more than 6 days go see a doctor cause it's probably vaginal bleeding