Hi Lauren, I get a lot of twitching all over my body and as well as FM, I have Peripheral Neuropathy, maybe you should see a Nerve Specialist and get tested. I also was terrified that I had MS before I was diagnosed. We tend to let our minds run riot and scare ourselves silly from Google and these life threatening diseases. Take some Magnesium to relax the muscles and stay off google. Below is a pic of how to relax, Australian style ....
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I have loss of strength and sensations. I was tested for a lot. It came back to Fibromyalgia. Same as it can cause hair loss or thinning.

You know, I recently started on a new migraine med and it has a side effect of constipation. Well, I learned years ago that increasing my magnesium would fix that right up. However, the magnesium I have been taking lately is magnesium chelate which gives you an energy boost so you can only take it in the morning. Plus it does not give you diarrhea so I knew it wouldn't help with this new constipation. So I just happened to have some older magnesium citrate. I added it to my evening regiment and that fixed the constipation right up. BUT... I have also noticed my muscle cramping and twitching has decreased slightly. Maybe mixing magnesiums is a good idea.

I understand your fears especially if you are recently diagnosed. However, since fibro mimics so many auto-immune diseases, making sure that this is actually what you have is very important. Having been sick since the 1970s, I have accepted that fibromyalgia is what I have and nothing else. However, when new symptoms appear, I find myself questioning have they missed something? Is it something else? It took 8 years for them to diagnose my grandmother with ALS. Plus we have MS in our family (also misdiagnosed for decades), so my fears are founded. All we can do is keep going back to the doctors and trust they have our best interest at heart. Hang in there.

Hair thinking on legs can also be a sign of poor circulation. Next visit show your doctor. My ankles swell and no hair grows there at all.