Kneed in the Back

I do cheerleading and a couple days ago I fell in a stunt. Long story short a girl caught me by the armpits (my arms were spread out and I was falling back) and she kneed me in the back. Right in between my spine and my left shoulder blade. It was numb and I was disoriented for a good 30 seconds. After that my back was stiff and extremely sensitive to touch. Now I can move my arms and twist my back enough to look in both directions. It is still super sensitive to touch. Anybody know what it might be? Should I see a doctor?