Left pointer finger joints hurt.

So just a few moments ago, I was playing my violin. Out of nowhere, my left pointer finger's joints just start hurting, a lot. It is the first joint from the fingernail. At first I thought it was because I didn't crack my fingers. So I cracked them. But it still hurt. it hurts when I clench my fingers also. I also have a problem with my fingers bending too much, as show in the horribly drawn picture.


Is there anybody who has the same problem and is there a way to fix it? Do I just have to wait it out?