Well if your DR wants to say its nornal then make him explain why all this is happening to you.
Hi, Unfortunately I'm not too good on how all the treatments work, so you will have to wait for responses from the more experienced people here. But I do know one thing, I was told for more than a year there was nothing wrong with my thyroid and my test results kept comiing back normal, even though I had all of the symptoms. My tests have finally started to show changes, but they still can't treat me until my thyroid settles high or low. So I am still getting all the symptoms and they are truly awful aren't they, so I know how you're feeling. Sometimes you feel like you're going crazy but your not, people here have helped me so much by telling me it's all down to my thyroid. So even if your results have come back normal this time, it doesn't mean to say they will next time. And if I were you I'd insist on more frequent testing, 6 mths is a long time to wait.