My neck is so hurt..

I feel like I am gonna die, Yesterday I played with kids, I put them up to my feet I don't really know what's the name of the game, Anyway, I put them at the bottom of my feet then, I put my feet up high with a kid on my feet then it's like flying up high I didn't hold this 3 years old kid and It's like flying up high kids love it then suddenly, ths kid flew at the back of me its like I fall backwards and it almost break my neck it's like I am upside down back..can't really explain it..Anyway, my neck is extremely hurt..I thought I broke my neck but thank God it's not it just so hurt..Right now I don't feel good. IT's still hurting. I will never do it again.