Could I have cracked my nasal cartilage?

If you had any bleeding after your injury then you have had a disruption of the nasal mucosa or a nasal fracture. You will need to be examined by a Board Certified Otolaryngologist or Plastic Surgeon that has expertise in this area. If there is minimal to no deformity and no septal hematoma then one can wait and do any reconstruction if needed at a later time. If there is any functional deformity then one can do septal reconstruction or rhinoplasty in 6-8 weeks after injury, but it is prudent to wait a little longer if possible.

 It is possible to fracture the nasal bones or the septum.  Sometimes patients break only the internal portion of the nose and the nasal bones  remain straight.  It's important to make sure there's not a septal hematoma, which can only be diagnosed upon physical examination. If he deviated septum is the result of the injury this can be repaired at surgery if  the septum isblocking air flow out of the nose.

It is really hard to tell what happened without a thorough examination. I would highly recommend you consult with a local facial plastic surgery expert or otolaryngologist so that a more accurate assessment can be made in person. Good luck with this.