Headache since Saturday- originally assumed it was due to the heat but has continued. Painful arms and legs - I cannot sit or stand comfortably at all, can’t sleep because of the pain. Have been shivering or waking up sweating. I’ve got no appetite and haven’t eaten a proper meal since Sunday evening. Gp appt today has ruled out a temperature and uti, pulse and blood pressure normal. Have got to have blood tests but does anyone have any ideas?