Maria,
After all these years, I can tell the difference in my various pains.  I've known for a long time that L2/3 was becoming problematic but as long as it behaved, I was more accepting and not as fearful.  The last couple of weeks the pain changed and coupled with radiating pains, I know what's going on.
I don't know the specifics and unless I intend to do something about it, which right now, no - I'm not going for an MRI.  I am not happy and can't believe I'm heading down this path again.  But, I am better this week than last so I'm still hoping with therapy, this will get better.  
I am writing a lot though

  Just finished my second book!
Dale