I have this problem too, though I've been told the term is "fasiculations"- is this the same thing as myoclonus?
Also, I had to laugh: I had the spasms (though it's worse now) and other pain that led to a visit with a hip surgeon. I actually did
have a labral tear in my hip that needed surgery! The spasms don't seem to be related to the tear at all since I still have them, but I appreciated the irony
Hope you get some relief soon!