Welcome! I'm glad you feel comfortable here and I look forward to getting to know you better. It's great to just come here and read or ask questions, or just vent your frustrations with others who have gone or going through what you are. Makes a world of difference for some so please don't be a stranger if anything is on your mind.
I see your question to the L'hermittes has been answered. The reflux issue can indeed occur in MS if there is a lesion in a particular area of the brainstem and it can also be a totally seperate issue too. Have you tried any medication? My husband also has the issue and Prilosec really helps him. Here's a link to some more information: http://www.mult-sclerosis.org/gastroesophagealreflux.html
As for the one-sided issue, that's pretty common with MS. A lot of folks have issues only on one side of the body, or if it is on both sides typically one side is worse.
I do hope you get some answers at your neuro visit. Please let us know how that goes and how you are doing.
Co-moderator for Multiple Sclerosis
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