Your chronic fatigue and underactive thyroid are due to a condition known as hypopituitarism. It is quite a rare disease. Your doctor should have prescribed Hydrocortisone and Levothyroxine. I know this because I too have the condition, and to say it blights one’s life is an understatement. In my case it caused growth hormone deficiency and infertility, as well as the fatigue you mention. You will also probably be experiencing anhedonia, which is an inability to gain pleasure or enjoyment from anything. And some say it is also difficult to experience love with this disease.

If you want happiness, you must be selfish and put your needs first.

Best wishes,
Tannhauser