Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much. You are really anxious about what may happen if you do not sleep and such thought becomes obsessive and really you are loosing your sleep. obsessive thoughts are always like that. Obsessive thoughts trigger anxiety and anxiety triggers obsessive thoughts. You need to understand the reason behind that day s feeling hot and sweating. That could just be fear about something or fight or flight syndrome. Please consult a psychologist to unravel the truth. Don t worry about your health. Consult a doctor, if you want, and he will take care of it. Psychotherapy techniques should suit your requirement. If you require more of my help in this aspect, Please post a direct question to me in this URL. http://goo.gl/aYW2pR. Make sure that you include every minute details possible. I shall prescribe the needed psychotherapy techniques. Hope this answers your query. Available for further clarifications. Good luck.