Ears being plugged sounds more like an ear infection or a sinus infection resulting in clogged eustacian tubes. I would have those checked first.
Since you are still having vision problems, perhaps a neuro-opthalmalogist. And if you suspect MS then you need to see a neurologist and you might look for one that specializes in MS.
Sharp pain in the neck is not typically an MS symptom either. You may have a bulging or herniated disc.....that could also cause numbness.