Re: Twitching, can this be?
Hi Lizzy H, and welcome. Have your doctors tested your blood mineral levels? Your symptoms sound similar to what happens when you have low levels of calcium (and perhaps magnesium and phosphorus, as they're all linked).
If you're also having heart palpitations, you may want to research copper & zinc supplements.
I've not been hyperthyroid, but I do have those types of "fibromyalgia" symptoms (pain, tingling, numbness) when I'm hypo. I had a lot of help with acupuncture, and the symptoms are now gone.
It's worth having the neurological check-up, but hopefully your symptoms can be resolved in an easier mannner.
<B>Meep, or someone with supplement knowledge: can you provide more specific links and details?</B>