Thanks for query,
I think as you have consulted endocrinologois thyroid
test might have done to rule out thyroid.
I strongly doubt about thyroid as you have dry skin
loss of hair.
So treat the thyroid if it is there.
Avoid fat totally,less carbohydrate
no food between two meals.
Take green veggies and fresh fruits.
Do regular exercise like running,jogging,swimming etc.
Ok and bye.