Hi PJ....I too am a calvary chapel girl!!
Remember your back pain my not have anything to do with your MS. I have been having low back and leg pain and achy/cramps.....my neuro thought it was my MS and ordered a new brain MRI as well as a lumbar MRI (at my request).
Well it ends up that I have 3 herniated discs in my lumbar spine.

Wishing you the best