I Am In Cheerleading And Am A Flyer, Recently My

I am in cheerleading and am a flyer, recently my bases dropped me and I landed right on my tailbone. I hit so hard I screamed and couldn't move. People had to help me walk and stand. I was dropped again this evening and I feel numbness on the back of my thighs and pain shoots to my calves. It also hurts whenever I push of pull something and is uncomfortable to breathe. What could I have done?