Well, debbied, I guess my point is just that your symptoms could be due to hundreds of causes - or a combination of causes, and there is just no single test for MS. It often takes years for someone to be diagnosed with it, and even then, there are no meds to cure it - just symptom treatments. You can get those even without a diagnosis of MS.
Fortunately, it sounds like your neurologist is monitoring you and has already done the most important test for MS - an MRI of your brain and C-spine. And that he/she will do it again soon. But...brain lesions can be caused by many, many, many other medical conditions that present in slightly different ways. When MS is suspected they usually confirm with a spinal tap. And yours was negative. I hope your neuro is also looking elsewhere for clues.
In my case, my MRI showed that my brain was jammed full of lesions that were VERY specific to MS, my spinal tap showed oligoclonal bands, etc., and my VEP test was positive - instant MS diagnosis. Personally, I don't have ANY of your symptoms except tingling in my fingers from movement or position, and that is due to my peripheral neuropathy and C-spine issues - not from MS.
I know it's scary to have so many unexplained issues, but the symptoms of all neurological diseases are so similar it takes time for doctors to sort through them. Since you mentioned vision problems, you might want to follow up with an ophthalmologist. Also, I suggest a physiatrist, a the type of physical medicine/rehab doctor who diagnosed me with both MS (a central nervous system disease) and a hereditary peripheral neuropathy (a peripheral nervous system disease) - even without
There's really no way we can do much toward helping you identify a disease from a list of symptoms; you need observation in person from a medical professional. Every one of us here, whether diagnosed with MS or not, presents with an entirely unique set of symptoms, and many of ours are from issues that have nothing to do with MS.
Here's a link that I post on here often - The Whole Brain Atlas. It shows examples of the way many different types of brain lesions present themselves. Under the MS section there's even a "cine" of MS lesions coming & going quickly.http://www.med.harvard.edu/AANLIB/home.html
I wish you well in your search for answers!