Bleeding during sex

Emily
Hey girls!!! 
So me and my boyfriend had some intense sex and we tried new positions... during doggy he pulled out and said that i'm bleeding, this was strange because this was our like 15th time having sex? 
so i bled, wore a pad and still bleeding, if you don't mind the picture, but as you can see i'm still bleeding tiny pits, please get back to me asap if this has happened to you?? and how long the bleeding lasts for!!!