I have similar problems with classic MG symptoms with gait and balance issues. I also have small fiber neuropathy ( leg pain and unusual sensation) and Neurotin has been a life saver for me in regards to pain. My right side is quite weaker including my face (left side of face is normal) and I will be starting Mestinon this week after an eye exam. I think I also have spasticity of the right leg. My right leg feels like it wooden. I feel like my leg is prosthetic and wooden especially when I walk and try to lift it up in PT. Yes all of my readings within the past few days points to MS as well. My MRI without constrast (allergic to constrast) showed white matter and vascular changes (no stroke)and just posted in MS forum also since I'm new here. I will keep you posted with any changes and I hope you will update us as well. Something is wrong and MG normally does not cause this. My walking is almost stroke like.