It sounds like you’re experiencing chronic fatigue and a sensation of heat in your body. Possible reasons could include hormonal imbalances, anxiety, or even nutritional deficiencies. While your tests show normal results, it’s important to consider lifestyle factors such as diet, hydration, and stress management. Engaging in regular physical activity, ensuring proper nutrition, and practicing relaxation techniques might help alleviate your symptoms. However, given the duration and persistence of your issues, I encourage you to consult an endocrinologist for a comprehensive evaluation and targeted treatment plan.