Hello,
Please calm down, firstly do you have any x-ray of that time when you where hit by an elbow then please post.
Secondly micro fracture on teeth are generally craze lines they initially don't cause pain. If you had pain there must be some else issue with it. Tell me did you went under any treatment for pain in 2018??
As for open bite if you want it corrected visit an orthodontist they will tell you about treatment measuring the bite.. If you had a jaw fracture it would have caused severe pain or swelling and eating problem also and doctor must have checked for it...
Next Steps
please visit a dentist tell proper history to doctor.
Get an opg done to rule out exact problem.