Do I have a busted, fractured or broken knuckle?

About a couple of years ago I tried to beat up a wall. Unfortunately I did not win this fight. The next several days my pinkie knuckle was bruised and a bit swollen, but nothing that really concerned me much. I just expected it to heal perfectly in time. Unfortunately, it did not completely heal. When I open my hand now as wide as I can, my pinkie knuckle will still hurt a little bit, not much, but there is some discomfort that I do not feel with my other pinkie knuckle when I do this. Also, when I open up my hand, right above the messed up pinkie knuckle I'll see these thick folds on the skin. This is not the case with my good pinkie knuckle. I never thought of going to the doctor as I've always expected it to heal completely and I don't have insurance right now so going to the doctor for this isn't really on my immediate to do list. Could anyone please let me know what's wrong with my pinkie knuckle and is there anything that I can do on my own to make it better?