Arwenamen,Your FT4 has dropped and that's why your TSH has risen. Ask for a dose increase to see whether symptoms improve. If your FT4 range goes up to 22 there is plenty of scope for a dose increase.
Ask for ferritin, vitamin D, B12 and folate to be tested. Low/deficient levels are common in hypothyroid patients and can make you fatigued and 'off'.
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