These are certainly scary symptoms. However, fear of an unknown is much worse than fear of a known problem.
With the initial symptoms and the finding of blurred disc margins, I agree with the eye doctor to rule out pseudotumor cerebri. With the subsequent symptoms over the past year, I agree with the working diagnosis of MS.
The best advice for you would be to go see the neurologist. You need an MRI as well as a spinal tap to rule out some of these diagnoses.
Keep in mind that pseudotumor is treatable. Keep in mind that many forms of MS are controllable with modern medications.