Thyroid level is 16. 5. Body is weak.

Sir, I age is 18 yrs old. My weight is just 40 kg. I am very thin. I dont like to eat anything. Since 15 days, I have a major problem. I feel like my whole body is burning and 'feeling' like about to die sensation. I consultant the Internal Medicine Dr and he does all type of tests. All the Tests like ECG, Ultrasound, Blood test are OK. But one test is negative, which is THYROID STIMULATING HARNONE (TSH) value is 16.48. The Dr gave medicine like Eltroxin 75mg, Olozole-P, Inderal 10, Etizola Plus and Stablon. Everything was OK, but again I got the same sensation like stomach and chest is burning and weak in whole body, dont know it is because of some problem or due to my inner fear. I really need help. How to reduce Thyroid level and what to eat. What should I do Sir? Shou I need to contact a new specialist? please suggest me soon. Thanks