I have been taking 125mg levothyroxine for nearly 4 years now after being diagnosed with an under active thyroid after having a baby. I was very ill and had many tests in the first year as I never felt properly well. I started self medicating with 50mg of tiromel which made me feel human again but I have recently been feeling terrible again so returned to the doctor. I've been referred to an endo as my results seem a bit strange to the doctor as I have normal tsh but low t4. I've had headaches, dizziness etc so wonder if it could be a pituitary problem which my doctor also mentioned but I'm also worried that the tiromel may have affected the blood tests! I haven't mentioned taking the tiromel and have stopped taking it for the time being until I know what the problem is. Any comments would be greatly appreciated.