I have read some things on sleep apnea but I was also talking to someone who has been diagnosed with sleep apnea and she said when she was not getting good sleep, she would awaken feeling cold all over and when she slept she would feel better. My aughter has been to a nuerologist and had a mri done showing nothing wrong. She has had chronic headaches that never go away, always there all day. This has been going on for 5 months so I am looking for new theories. The nuerologist thinks it is intercranial migraines and has started her on a medicine but I am not convinced. Any help would be greatly appreciated.