I had an LP after my MRI of the brain showed lesions. I also had Sensory Evoked Potentials, Vision Evoked Potentials after switching to an MS Specialist who wanted to confirm my diagnosis. I had an EMG too. I think with MS the EMG is usually normal. Mine was. Not to mention loads of blood tests.

You have to remember all the tests you have to have done do send your doctors in different directions because they rule things out. I know how frustrating and scary it is. Hang in there! We're here for you.