Personally, I tackled this sort of feeling by just learning to accept these two fundamentals:
1. Can I Do Something About It?
If I can,I just do what I'm doing (in your case you're well along this step).
If I can't, I don't worry about it.
It's all about a feeling of self-control over...
Thanks for sharing your story. FYI - this is the story that made me join this site! That's all.
EDIT: I started a blog about my own Sciatica adventures! (How to deal/relieve pain etc) - www.lifebymelissa.com