You need an increase in dose. Your TSH is a tad high for someone on Armour, and your Frees are too low. 90 mg Armour is only a tiny dose : 38 mcg T4 and 9 mcg T3. Most hypos need at least double that.
But, don't double your dose! Go up slowly, so that you don't miss your sweet spot. 1/4 grain every two weeks, and at 2 grains, hold for six weeks and retest.
You probably wouldn't get another dose. The lower the dose, the more costly the pill. But, you need to cut it in quarters, not just half. Increases are 1/4 grain every two weeks.
Blood tests were introduced along with levothyroxine alone, i.e. T4 only.
As NDT contains, T4, T3, T2, T1 and calcitonin, once we're on NDT all the concentration should be on our clinical symptoms and the relief of them. I shall give you a link and it was by an Adviser to TUK. He only took one blood test for the initial diagnosis, and thereafter it was all about relief of symptoms.
The following is his link which I hope will be helpful. Read 'Safelu Getting Well with Thyroid Hormones'.
Previous to blood tests, we were all diagnosed upon clinical symptoms alone and given a trial of NDT.
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