Help ! im only 13 and think i screwed up my back already. =[?!

Help ! im only 13 and think i screwed up my back already. =[?

one time in gym , we had to play soccer. i had the ball but the two girls were runnin up behind me. the both kicked for the ball at the same time. but the both missed and hit the back of my ankles.so i fell and landed on my butt , but my body stayed upright when it happened. When i got back up i couldnt breathe. and any chance i was able to breathe, my body forced the air back out. this went on for about a minute. then my back was hurting for about a week. then it stopped. but a little less than a year later, i started feeling sharp pains shoot from my back injury to the other side of my back. and when i bend in certain ways , my back will have those sharp pains again.and sometimes when i land on my back from a fall, i have the breathing problems again. i dont kno what is wrong. my mom said she would take me to the doctor but hasnt yet. i dont think she will any time soon. so does any1 kno what might b wrong with my back? im only 13. i dont wanna have a bad back when im this young.

Ouch!