I've been having the same problem. However, what has really bothered me is the 'out of body' feeling that I've been experiencing... Perhaps it's fibro fog, but on a larger scale. Fibromyalgia is so...
I tend to drop things when I have a very powerful muscle spasm. I usually get them in my arms or legs but, sometimes, I notice my neck twitching. Sadly, these 'twitches' are normal for Fibromyalgia...