I have been experiencing alot of anxiety symptoms lately, even though being on medication it still doesn't go away.

anyways the other night I was sort of half asleep and my foot started shaking? I had no control of it for those few seconds, it was weird, has anyone had things like this happen?
it just made me feel sick with worry.

I also get alot of muscle twitches, in my legs, mainly in my hands and fingers though, sometimes all over.