I too have these weird sensations. Mine occur all over my body, at any time of the day, but mostly at night after I lay down. It is like my body is trying to play music without a melody, but lots of weird rythem.
I also get them in my tongue, and ears,(sounds like a base drum). the tongue is always in the day time, and the ears are always at night.
These are an every day, every night thing.
I have not been DX'ed with MS yet my symptons just started about a year ago. I have had all kinds of tests and all havve come back neg. but I could write a book on what my body gos through on a dailey bases.