Extream back pain after color guard accident?

We had a well known color guard trainer come and teach us better dancing skills and taught us the backwards sumersault. We had NO mats and we were doung these on a hard wood floor. During the final preformance I did my sumersault but insted of going over my shoulder I went straight back and got stuck on my neck. I was the worst pain I have ever felt! Now a few days have passed and the pain is still not gone AND mt guard instructor is making me start spinning again TODAY! Does anyone know how I could cure my back pain? And also do you think its right that my intructor is making me spin after I could bearly walk for 2 days?