Hi Miss Laura,
I totally relate as I write this at 3.30am

I know how horrible it feels and could explain the way you are feeling annoyed and irritated... I feel this way also lately. I used to take zopiclone and no trouble getting to sleep but for the month I have tried to take myself of it, I have fallen back into horrid sleep pattern
Have u spoken to doc about sleep problem? If u havent than I'd say you should
Good luck!