I Had My Period Last Week Friday On The 17th.

I had my period last week Friday on the 17th. I should of been done and thought I was but when I go pee n wipe it's a light pink but not a lot. So I stuck my finger in my virgina n touched what I'm guessing my cervix which iv never done and my finger was full of blood. I'm scared...why is that and what's going on??