RaniyLaine, I'm really
sorry for what you've been going through, but it's obvious that while your neuro IS interested in treating your MS, he is clearly NOT interested in treating your low back pain, or anyone else's most likely.
Actually, many neurologists these days simply don't treat lumbar pain, unless they also specialize in pain management; it's just not what they became neurologists for, and lumbar pain in particular isn't usually very gratifying for them to treat
What has been done to diagnose the cause of your back pain? Specifically, was a lumbar CT or MRI performed? (Plain film xrays aren't usually enough for someone in your situation.) If you haven't had the right kind of imaging done, then that's the first priority.
From your description of the stepping-into-a-hole injury, the subsequent painful symptoms that resulted and have persisted, and the postures you have to assume in order to get some relief, all sound typical of a significant lumbar injury, and definitely NOT anything caused by MS!
Bless your heart...I totally know what you're going through. And it sounds like your doctors haven't been much help at all yet. I've seen doctors get all excited by a flashy new diagnosis like MS, and forget to focus on the less-exciting problem the patient actually came in for, such as chronic lumbar pain, which really causes at least as much trouble and pain as does the flashy diagnosis that gets all the attention, if not more. ....
Speaking from wide personal and professional experience (but not
as a doctor), I'd bet money
that your back pain is in no way related to your MS, although the stress of constant pain and sleep deprivation can certainly make MS symptoms arise.
Go back to your primary care physician or the orthopedist, and insist
on adequate diagnosis and treatment of your back pain. Do NOT let them blow you off with excuses like "everybody has back pain", or "it's probably from the MS"; no one should have to deal with the symptoms you've been having without a serious effort at help.
Meanwhile, hang in there!