Ok so for a while I've been having a some issues and I've been backwards and forwards to the doctor's. On Monday they finally did a blood test to see what my thyroid was doing.now I've never been a good sleeper and I'm always tired. That's never changed. I got a call today from my doctor. My thyroid is 26.9? It should be between 12 and 24. He's refered me to the hospital to see a consultant but he said it could take a few weeks. He said to call back if anything gets worse. How do I know if it's getting worse? My symptoms can't get a lot worse. I know an overactive thyroid can be dangerous. So does anyone know how long an overactive thyroid can go untreated before it becomes dangerous? I went to my doctor about other issues after I started having pain my chest and arm. My heart and lungs where ruled out. Any help would be great. Thanks!