Blood

Ok, so I'm due on Sunday (12th) and been losing bits of my music plug for a few weeks. 
Today there has been small pinprick amounts of blood, there seems to be more of it, and it's all tinged a light pink. It's not enough to class as a bloody show, right? 
And it can still be days/weeks after this happens that labour begins? 
I'm so confused! Any help gratefully received!