Try to hang in there. The diagnostic process to either rule in or rule out MS is long, confusing and not always accurate. There is not one test for MS. It is a diagnosis of exclusion. Early MS sometimes doesn't show up on an MRI and that can complicate matters.
By the way, I have a friend who was diagnosed while enrolled in a firefighter's academy to become a paramedic. He completed this school and went on to become a paramedic. Please don't assume your life is over with an MS diagnosis. It can be very scary, but this disease is different for everyone. Many do manage quite well. There are many ADA laws in place to protect people with disabilities in the work place.
Your symptoms are disturbing to be sure. In my opinion, you haven't listed one symptom that in my mind eliminated MS. Often people come here and list their symptoms and they have one or several that just don't belong with MS. (joint pain, sore throat, skin rashes, etc.......these indicate some sort of infection and not MS) I am not a doctor, however and these are just my opinions.
I am hoping and praying that you don't have MS. Make sure your MRIs are with and without contrast and are the specific technique used for looking for MS lesions. I am glad to hear that you are getting both spine and brain. By the way, if they do use a contrasting agent (usually gadolinium) make sure you have a history of good kidney function and drink lots of water for the next 48 to 72 hours following the MRI.
Please keep me posted. Ask as many questions as you would like. I am concerned.