@ral, I'm not positive how I injured it in the first place. I assume it had something to do with barefoot falls and those pesky "fall backwards towards the boat" falls while trick skiing. There was no defining moment that I can say was the cause. Basically it had bothered me on and off for a few years, but March of 2012 it just didn't get better on its own like it had a few times before.
So, I assume I had a bulging disc problem for a few years before the full blown rupture occurred at some point. My MRI indicated I needed C5-C6 done too, but the Dr. said when he got in there he decided it wasn't necessary. However, I think that decision was based more on the fact that there were complications with my surgery and the Dr. didn't have time to the second disc.
Good luck with your procedure, I sincerely hope it goes well for you.