I saw my endocrinologist and after years of complaining of hypo feelings, she has finally decided to let me try adding T3 to my T4 medication. I take 75mcg of Levo - she's left this the same - and added a quarter of a .025mg pill of Cynomel (T3). I take both first thing in the morning. It's been two days. I'm very nervous and hopeful this will make me feel like me again. But so far my head is heavy: like I have pressure across the top of my head. I also feel concentrating is a challenge. And looking at a screen isn't too pleasant either. So I'm wondering if this will pass? Is this an early sign that T3 isn't for me? Anyone know when I should start feeling 'better'? Or anyone have similar experiences?