I agree with White Shark. I am in the similar boat as yours, 26 yrs old, severe hair loss, constant fatigue along with digestive issue (dysphagia mainly). I also suffer from eczema, SD, and pityriasis rosea. All the symptoms are getting worse, especially hair loss.
For me, my free T3 level was normal, but free T4 and rT3 levels were high while TSH level is on the low functional end. This points toward hyperthyroid, and I am not 100% sure what I need to do with this condition.
Back to your post, I believe that you are suffering from adrenal fatigue, which is thwarting your body to get back to homeostasis. I would look into adrenal fatigue supplements like Ashwagandha and Phosphatidyl. Coq10, PQQ, and vitamin B complex might be helpful as well. Please get some blood test and decided based on your condition. Be cautious with supplements. Good luck!