Can someone help with my collarbone pain?

I broke my collarbone when I was 14 falling off my horse. quite a bad displaced break in 2 places and healed out of line (docs didnt operate) Its never really caused me any major bother before, besides looking a bit lumpy, occasionally if i slept funny or twisted myself it would hurt for a day or 2 but over the last few months its been giving me jip, and i get a dull pain in it pretty much constantly. Its not agonizing or anything but its pain and its irritating and restricting what I can do. Anyway my question is I'm wondering if theres anything they can do? ie rebreak it to align it. Or is it too late now? I'm 19 now by the way...