Muscle Twitching All Over Body... Can This Be Anxiety?

Hello all, i've been experiencing muscle twitching for about 8 months now, but it started with just a few twitches of my hamstrings while sitting for long periods of time.

It has since progressed to the point that I went to my dr and he ran bloodwork (suspected potassium deficiency)-- all blood work came back normal and he gave me a low dose of xanax because he felt that I was causing them with anxiety.

My issue is that they have recently become worse, to the point that I have somewhere around 10-20 every minute and they vary in size and duration- mostly in my legs but also in arms, stomach muscles and back. They can be a small twitch, major spasm where the limb jerks or just a constant "buzzing" feeling.

The xanax seems to lessen the twitches but not stop them altogether. I have ruled out dehydration and other causes like caffeine (i don't drink coffee or sodas). I've been on a few forums and of course dread the worst ie.. Als, ms or similar -- but mostly i've found that I only have a few of the symptoms they involve.

I have always been a nervous/ stressed person but this is a little too extreme for me. I'm finding it hard to concentrate with constant and random twitching all day long..And at night when I get into bed, it feels like electrical impulses are running through my legs. Any advice would be greatly appreciated!