About 2 and a half months ago I was playing american football. I was about to catch the ball but the QB threw it too far and it hit the tip of my ring finger (probably bending it backwards) and it was quite painful. For the following week, the finger joint closest to my nail became swollen and it was really sore to touch. The swelling went down after about a week and most of the pain went away. Now I can play the guitar but when I twist the finger tip from left to right it still hurts. Also the joint can't bend fully as my other ring finger, but it almost does. Why? Could it still be healing?