cac can tell you all about hypothyroidism, as he has it too. Many GPs don't have the latest information about what the acceptable range for thyroid hormone is. Cac told me that the medical community keeps adjusting the range of acceptable levels, meaning that people who were once considered borderline are now considered hypo.
Have you seen an endocrinologist?
ETA: I also understand the getting to the right level of hormone for some can be tricky.
