Thanks so much for all the feedback!
I'm having a brain scan just to make sure it isn't something physical going on.
I've been listening to relaxation music before sleep and it does help a little bit. Last night, I could hear loud techno music and was trying to find where it was coming from. In the end, I found it coming from my electric cigarette and as soon as I picked it up it stopped!
Anyway I was able to sleep till 4am after that

Thanks again x