I take a magnesium and potassium supplements to help with weakness, and tonic water with quinine for muscle twiches...4-8 ounces as needed.

I have spots where the weirdness will stay for days or weeks, just long enough for me to worry about it honestly. I've been on this merry go round for over 2 years. My aunt has fibro. She got it back in the 90s when few had a clue about it. She said she got new stuff all the time and would worry. After a couple years, she said she figured if it hasn't killed her by now, it ain't going to. Lol. I relate. Good example, I never had pain in my tongue or mouth or neck before until a few weeks ago. So my mind naturally goes to worrying cause it's new and all that. But I figure in a month, it will be something else. My advice is five it time. Try to focus on something else. I bet it will slow down.

It's only something that has just started happening for me, but I get this sporadically in my wrists, arms, and sometimes calves from knee down as I'm going to collapse. It's hard to know sometimes if it's Fibro related or Arthritis, but either way it's frustrating as hell.
I have had to wind my magnesium right back as the high doses I was taking were causing severe stomach upset, but maybe it's time to factor a bit more back in.

Thank you for the response. It’s just annoying because I get them in “hot spots” where it will stay in the same spot for a while.

I do. Do not worry about them. Trust me. It's stress. It is common in so many people, and it's stress. Then when you Google the cause, Dr. Google freaks us out, we get more stress, and more fasiculations. My best friend does not have fibro, and she gets them during periods of stress. My husband gets them. Nothing helped mine go away until I stopped worrying about them. Then one day I noticed they were gone. And they came back, but it's stress cause I have been in a flare.