Is it normal that i get chest pains when i'm this young?

I'm 13 years old. A female. I was diagnosed with Costochondritis a few years ago and its been found that in fact, I do not have the condition. In January of last year, I was in P.E. playing tag. The boy who was "It" was chasing me and another player tripped me. I fell and "It" didn't stop. His feet stomped on my tailbone, mid back, left side (affecting my left ribs) and my brain stem. Knocking me out.
I was then told that I had Epilepsy because I kept twitching and my legs and arms would move slightly involunteerily.
I now go to a Chiropractor once a month and he helps a bit. I used to be a little eery on Chiros. From all the rumors that "they aren't real doctors." But I went to many, many hospitals. All of whom cost a lot and kept saying it was the previous condition that had been ruled out or Epilepsy. I've been told that my ribs are messed up but no more other than that.
Now, when I'm stressed, in an area/going into an area with high or low pressure or some other things, I get them and have to hold perfectly still.
Its a stabbing pain in my left ribs and sometimes ends up with a headache I've called "The Hammerhead." Its not one constant dull pain, rather, its a knocking on my brain over and over.

Any ideas on what this is?
Is this normal?

(https://health.google.com/health/ref/Costochondritis)