I have been having problems with a rapid heartbeat,fatique,nervousnes,insomia, so my doc checked my thyroid and the results were tsh 1.64(normal), t4 13.8 (high).he said he would get me appointment with endo a month ago and I still don't have the app. So when I called back he said it could be up to six months before I get one. He says he cannot treat me for this but he doesn't tell me what this is .I have gained about twenty pounds in the last four months, so can I have a hyperthyroid and gain weight and have a normal tsh.and also I stay cold all the time and my understanding is if you are hyper you lose weight and are hot and sweat a lot. I'm completely confussed and my doc is no help.