Go in and see a doctor tomorrow. If you got a tendon or ligament it could or could not hurt. If you severed the tendon you can walk around without it and will have to decide if you want to be able to straiten out your toe or not. Being able to flex it downwards (bottom tendon) but not upwards (top tendon) may mean you got it. Trauma to an area can make it hard to move that area sometimes though. The dark dark red blood is just because by the time the blood reaches your toes it has expended most of its oxygen and gets darker. Sorry for the wishy washy answers but a physical exam will be the only way to really tell what you managed to do.