ezbtr,
I hate to be the bearer of bad news, but after I got shot in '91 all kinds of different thing started happening, it was a traumatic injury and I was not able to keep moving the way I did before, then when I fell off the ladder in 2006, things got way worse, but there were signs of OA and RA when I was in my 20's, so it is not something that is new, it is very frustraiting, but injury or not, it is a part of aging, another thing they need to check for, is stenosis in the hips and back which is a narrowing of the nerve paths through the bones, which is also common as we age:
http://en.wikipedia.org/wiki/Stenosis
It looks like I am going to have a rotor router job done on my hips to open those nerve paths up again, so they are not pinching, I know because you were injured on the job, it would be easy to lay blame, but you need to get with a good back and nerve doctor and have a MRI to find out what is actually going on. There are a lot of pains that all of us ignore when we are getting older, then we get hurt and want to blame the injury, but you need to find out, how these things progress and treat the aging areas of your body and not blame everything on the injury from work, you need to get with some good doctors who know about this stuff, believe me, I wanted to blame everything on my gun shot wound, but in truth, many of the things I have going on, has nothing to do with it.
Good luck, keep your chin up and pursue it until you have a plan of action, they told me I would never walk again, and I have run 4 mini marathons in the last 5 years.