Not much you can do. Except keep it taped down so it doesn't snag on stuff. However, I'm no Dr. even though I play one on the net.

I jammed my middle finger playing football. Did the same thing. The wild part was the nail started growing again and as it grew it pushed the old one out. For awhile it looked like my fingernail was cracked in half.

Eventually it just grew enough that it fell off. I did have a wierd hump in the fingernail area for years!

L8R