Hello Doctor, I am having thyroid taking 100mcg thyronorm, my TB in the pleura is cured , I have some posture defect as cited by a physiotherapist due to which my head swings but for the past two months on and off when asleep  my head gets foggy headed, confused,too many events collide with each other, not able to concentrate, headache, skull seems heavy, due to which blurry vision, sometimes vision is less blurry sometimes more i have not been able to sleep when this happens, as in the middle of sleep i get foggy headed and I wake up not to sleep again till morning,. Please guide me