Hello..
Thyroid 5 is withinn the normal range but then it's probably in the range due to the medications..hair fall may be genetic or due to changes in weather,water food intake as in protein insufficiency,
calcium deficiency, anaemia, thyroid, etc... I need to examine you for that...its better you consult a dermatologist... Make sure to have protein rich diet..have good green leafy vegetables, dry fruits etc..drink plenty of water too...