I hope all goes well with your MRI.

I get zaps but mostly just in my ribs when the MS hug is behaving badly. Nerve pain goes right a long with the hug for me. I also get nerve pain in my legs quite often and it causes muscle spasms for me. I usually get the nerve pain and then the intense spasms follow shortly. I do have spasticity throughout the day to varying degrees.

I have the crawling feeling but it lasts more than a few seconds.

My feet do not get blue nor are my eyelids drooping.

My legs do feel heavy and sometimes numb, but again, mine last longer than a few hours. I can go days without that feeling and then days with that feeling. There are a lot of factors that contribute to the severity of it such as doing too much, heat, etc.

My jaw doesn't hurt after chewing my food but I occasionally have trouble swallowing.

I hope that helps you out. I think others will come along and have different experiences than I do based on your list.

Let us know how things go for you.