I really don’t know, as the symptoms of a back injury can very closely resemble those of MS.
I am a diagnosed person, but when I was first investigated, it was for a suspected “slipped” (herniated) disc. Nobody - least of all me - was expecting this to lead eventually to an MS diagnosis, but it was only when I had a spinal MRI, and the expected spinal injury or mechanical defect wasn’t found, that it sounded alarm bells with my (then) consultant neurosurgeon that we were dealing with something quite different, and he referred me to an MS-specialist colleague.
In your case you’ve indisputably had a spinal injury, which was the only thing that didn’t quite fit, in my case, as I was not conscious of any recent injury, or even any heavy lifting or carrying that could be responsible. Additionally, I’d always been led to believe a slipped disc was agony, and none of this fitted my experience.
I should have thought, though, that the MRI would have answered the question of whether there is mechanical impingement of your spinal cord. In my case, there clearly wasn’t, and that was how the investigation took a different turn. But if your MRI showed there’s definite compromise, it’s probably enough to explain the symptoms.
The MRI should also have shown if there were any spinal lesions independent of the injury, BUT spinal MS lesions are much more subtle and harder to detect on MRI than mechanical damage. It was only by the greatest good luck and vigilance on the part of the neurosurgeon that my one was seen. I’d been literally on the point of being discharged, when he took one more look at the screen, and said, ominously: “Wait! I want to know what that is.”
It appeared as very faint fogginess of the image, and was literally no wider than dental floss. Very hard to spot - especially by someone who was only focused on finding the very pronounced anomaly of a slipped disc. So all credit to him that he saw it, and recognised the implications - it wasn’t really his field.
I don’t know what made him hesitate and look again. He must have had some kind of intuition/premonition.