I feel exhausted all the time. I sleep about 9 or 10 hours a night but could fall asleep in seconds during the day if I sat in a comfy chair. Feel cold and shivery. Wake up every morning with numb hands. Head feels so fuzzy and I can't focus on anything. Dizzy spells. Really forgetful. I've got a telephone GP appointment for mon but just wondered if anyone had any thoughts on what could be causing it?