I have half a thyroid and antibodies, recently got GP to increase levo dose from 100 to 125. She did this and asked for an immediate blood test which gave a result of 0.2. That was 6 weeks ago, blood test now shows TSH 0.05 with instruction to reduce dosage to 100 again and blood test in 8 weeks. My TSH has never tested this low, what is happening? Annoying cause I felt a bit better on 125 mcg of Levo.