I'm Concerned. My Period Always Comes The Day I Mark

I'm Concerned. My Period Always Comes The Day I Mark In My Calendar, But For Some Reason, a Week Before My Period, There Was Some Very Light Bleeding. I Thought It Was My Period. I Put a Pad On, Went To Sleep And The Next Morning Nothing Was There. I Noticed That Every Time I Pee/ Wipe, There Would Be Blood. One Minute There's Nothing, Next Minute It's Blood. I've Realized That It Isn't Coming From Where Menstrual Bleeding Usually Would, I Believe It's Coming From My Clit. Is There Something Wrong? I Don't Know What To Do & I'm Afraid Of Doctors. Please Help.