Hi, I'm 16 And I'm Also A Female. Last Week

Hi, I'm 16 and I'm also a female. Last week on Saturday morning I woke up and I started my period but during the whole entire day I didn't drop anything until the night when I went to sleep I only dropped like a few dots of blood. Then on Sunday morning was the same exact thing . On Monday and through the whole week I started dropping more blood but not like I normally do and I'm still on my period till this day and it won't go away and if you count Saturday and Sunday today should be my 9th day and I normally don't last that long so should I be concerned ?