Bleeding.

My period isn't due for another 2 weeks. My boyfriend fingered me today and when I got home, I went to go to the bath room and my panties were covered in a dark reddish brown blood, not the normal red. And for the last few hours I've had to wear a tampon so it doesn't get anywhere. I don't know what it's from and I know it isn't from him. Help please?!?!