Dr. Hanif warmly welcomes you! Thanks for consulting at my virtual clinic. I have carefully worked through your case, and can well realize your health worries. Being your physician, I want to assure, I will take care all of your medical concerns. Normal core temperature of the human body core temperature is 98.6 degrees fahrenheit. Your temperature remains below this levels and it is quiet in range of normal acceptable temperature.Your thermometer may also be wrong and it may be a fluke reading. In Either case I would like you to assure that if you feel sick, it may be due to: Hypotension Low hemoglobin levels Thyroid problems (your physician did check it, still you need to proofread with another thyroid profile from the best lab in the area). What is your Body Mass index It is necessary to find out if your body is underweight and undernutrition and isn t producing enough heat and energy to maintain basal metabolic rate and core body temperature. In this regard I nee your age, height, weight, waist circumference to guide you better. Along With that I also need the test reports of the aforementioned blood work. You may contact your local physician or me, as per your ease, once the Blood work results are with you. Hope I answered all of your questions. Have a wonderful time ahead. Keep in touch for a follow-up too. Regards! DR. MUHAMMAD HANIF USA