Edited: I'm now thinking that I've had cause and effect reversed... please read second post.
For 10 months I've had leg heaviness and some tingling with pain very specific to my SI joint and down from there.
Two orthos shrugged after a clear lumbar MRI and said go get PT for lower back pain. Ironically, I didn't have LBP at that point, but now I do, even though my primary pain is still in the SI joint area, down my butt then down my leg -- which leads to my first question: Can an SI joint problem lead to lumbar/lower back pain? I'm guessing that it's simply from compensating for the pain, or maybe from 3 months of PT for lower back pain that I didn't have while ignoring the pain I actually had?!?
New primary doc diagnosed sciatica but treatment for that got me nowhere so he sent me to a pain management specialist, plus ordered a cervical MRI to placate me when it was clear that he didn't really believe that I was having the weakness and tingling in my arm that I was now describing. Pain management doc said he thinks it's SI joint problems and scheduled both a nerve test and an SI injection. Problem is, the next day he got my cervical MRI and immediately scheduled me to see a spine surgeon because the MRI showed that I have significant issues in my neck including a c-spine that looks more like a > than a C (twisted, kinked, backwards curve) with a hemorrhaged disk pressing into my spinal column, with evidence of myelomalacia. So I'm guessing that this is the cause of my arm problems, but are the problems in my neck the likely reason why my leg has been heavy/weak, or is the SI joint problems the likely culprit?