Have Hashimotos and low Vit D and iron. Started on 25mcg Levo in Dec, increased to 50mcg in Feb when also started on Vit d and iron. Had acute thyroiditis attack beg April and went back downhill (tiredness, weight gain, feeling cold etc). April TSH increased from 1.0 to 3.95 (0.3-6.0), FT4 decreased from 15.1 to 11.8 (7.5-21.0), FT3 decreased from 5.2 to 4.5 (3.8-6.0) Endo increased Levo to 100mcg and doubled dose of Vit D and iron. Tiredness improving though still not great, weight gain stabilising but feel like I'm having a nervous breakdown! A few headaches plus feel really wound up, often quite depressed - very low, sometimes tearful and sometimes aggressive - nightmare to live with. Am wondering if it's because I'm till under-medicated post my last thyroid attack. Or any other ideas?