The Phalanx bone on my thumb appears as it is pushed forward more than it should be, is there any way to fix it?

I was playfighting with my brother a couple years back and hurt my thumb in the process. I went to a doctor and he had dismissed it has it being sprained. Whenever I put my two hands together and stretch my thumbs back as far as they can go, my left thumb goes further towards me than my right. There is a noticeable bump where the phalanx connects to my metacarpal bone as well, making it more angled inwards than my other thumb. I can’t place it over my fist as well as I can my other thumb and sometimes if I hit it against something it will make a “pop” and I’ll have terrible pain.

http://en.wikipedia.org/wiki/Phalanx_bones