Armour, 90 mg/day. Tests results: T4 Free, 0.80, T 3 Free, 4.1, TSH, 0.894. Still tired and loosing hair.

Tired and loosing lots of hair. Dr believes  90 mg of Armour per day is the correct dosage. According to lab values, my Free T4 0.80 is LOW (normal range 0.82/1.77)  My free T3 is 4.1,  normal but high (normal range 2.00/4.4). Dr told me that with Armour (natural thyroid),  the most important value is a high T3. He did not give any importance to low T 4. I feel tired,  loosing lots of hair and have more difficulty loosing extra pounds. Could it be I am not correctly medicated? What do your suggest? Thanks