S.B.
This happened to my best friend. She had her family doctor run tests two years in a row and it always came back negative. She was convinced she had an issue and although she has always been happy with her family doctor she found an endocrinologist. He ran a more detailed series of tests and discovered her to have hypothyroidism. He told her she has probably had it since the birth of her son (13 years ago). She was so relieved to know that all the odd things happening to her had a real source and were not just in her mind. I would get a second opinion.