My sleep is beyond terrible, as i'm falling asleep every night I get a weird shaking feeling in my body, the only thing that stops it is to get out of bed,

Now something else is happening and that is my legs get, it's so hard to describe, the feeling where I have to constantly move them, it's just an awful sensation in my legs, the other night I was fighting it for hours and hours, only got an hour's sleep.

Does anyone know what causes this and how to stop it please?

Did have severe concussion last year and have a lot of cognitive problems, could this be the cause?