Do I need a chiropractor?

Okay so I get back pain sometimes in my lower back. Im only 19, Self aligning it generally deters the pain for quite a while. Anyway, I started exercising again. I did a quick warmup then started punching and kicking (Martial Arts). As soon as I punched, my back let out a big crack. As I continued to punch my arm also let out a mive crack. I feel a mive flow of blood throughout my body (Might Sound strange), But it was a big surge, felt pretty good. Anyway, my bones seem to need a alignment, should I go see a chiropractor or is this exercise doing me good and providing enough release on my joints?