Typing with one hand

Yep, it finally happened after almost three years...I was injured at TKD. And the sad part is I hurt myself!!! Geez. Honestly. I started learning my new second degree form. The entire first part is balancing on one leg or the other and believe it or not, that is not how I hurt myself. I was doing an assisted knife-hand punch (I think that is what it is called) the hand that is suppose to assist was high so my pinkie finger jammed into the side of my fist. Immediately, I knew something was wrong. One of the other students said maybe I hit the nerve. I don't know what I did but it is sore. I still sparred though. Now, it is swollen, very tight and the underside is a pretty blue/purple. I'm hoping it is just a sprain and in a few days it will be better. Keeping my fingers crossed.