My guess is that you may have had the wedged vertebrae for quite awhile and that is not causing the pain. But now you have developed some degenerative changes at some of the segments which is causing some stenosis (narrowing) in the foramen and the disc osteophyte complex which is causing some disc bulging
that is pressing into the central canal...again, causing the canal to narrow, which puts pressure on the nerves contained within the canal.
Since these issues are not severe, it will be a matter of managing the pain...through conservative treatments. It is something you will learn to manage. It is nothing to be terribly worried about, if that helps any.