How to overcome my fear of barrelracing?!?

I had a really bad accident last year during barrel racing. I barrelraced once more after that but I was so scared that I could barely lope the pattern. So here is the story..The day started out good with all the original contesting cles..then in barrels my first turn was good then my second turn, my horse(that is now my show jumper) took off bucking. Luckly I stayed on. Then my second horse had an amazing run but on the way home she would not stop and we fliped over the fence. Landing on top of me..I went unconcious and woke up in the hospital. I had a dislocated shoulder and screwed up my back really bad. I havn't barrel raced for a year now. How can I get over my fear?