I'd check your state website & work comp rules, just in case.
If a larger company often they will make a job for injured employees, to limit time/ loss/ monies (ie having to pay if you are written off work) but less chance with smaller limited companies.

And maybe consult/interview with some good wc attys to get their opinion on "what if's" - if aggravation to a preexisting condition is a solid case for a work comp claim?
vs if this is a new injury vs just happened to show up now.

Some drs are not interested in pursuing work comp injury & claims, so you might need new drs.
A wc atty may have a drs list of helpful drs.

Drs & atty should ask these or similar questions below to help sort out if a new, or aggravating factor, and if possible work injury.

Do you have any history of treatment for pain or symptoms of this previously?
Any family history of DDD at all?

Do you recall a time at work where you had a minor twinge and it got better? It could even be something like that , and with time and use it got worse.