Pelvic pain & bleeding :(

Jade • Happy, funny & lovely.
Hi guys! Since last night I've had a lot of pain on my pelvic and i don't know why. When I go to the restroom, after pee I feel pain on my pelvic, and i noticed I had a little bit blood, now stills hurt, and I wanna go to the restroom but it's like if I can't because it's just the sentation. By the way, i've had sex on this week , anyway that can be a reason why?