How do I fix a jammed or dislocated finger?

About 4 months ago I hit a stone and injured my knukles. A couple of days later I noticed that two of my knukles were swollen and that my small finger seemed jammed. I didn't touch it (besides putting ice) because I tought it would heal. But to this day the upper side of my small finger's knukle swells and it's as if my little finger is jammed. I pull on it, it cracks sometimes but never comes back in its place. I always have a small bump on top of my knukle. I went to the chiro but lost hope ( was costing 50$ per treatment). Is there another way to fix it or heal it?