Pain In Throwing Elbow Question?

I'm 15 and i was at baseball practice yesterday, and as i was taking some infield practice i felt a sharp pain in the back of my elbow. The pain was in the back of my elbow about an inch up almost in my tricep. After that pain, my arm had a dead or hanging feeling where it felt like i couldnt lift it. I was able to throw the ball, but it was a lollypop with barely any velocity on it. I read online that it may be tendonitus, is it that or did i seriously hurt my arm?