I am glad you found Neuro talk. I want to welcome you to a very informative and compassionate site. Hopefully you will make some new friends along the way. There is a MS Forum, and spinal forums. At the top of the page you can type in where it says "search" and that will lead you to dicussion groups. You can also talk to any of us, on all the sites. This is a really laid back group, and I am sure others will offer you some suggestions.
I would be uncomfortable also, with just one opinion. MS is hard to diagnosis, and having been told you have it, then not, would be upsetting. Also Back injuries can give you the weakness and pain in you leg. It may be good to go in for another opinion. Please try to keep a journal of your symptoms. If you choose to go back for another opinion, it will be that much more that the doctor will have to try to diagnos you. Welcome again, I'll be here if you need to talk too. ginnie