Barb, he is not a gyno. He's supposedly a thyroid doc, though not an endo, either. He's another failure of a doc who was highly recommended in the top docs list and wow. What a flop. :(
Is this an endo or a gyno? He's, obviously, reacting to the TSH and nothing else. You might try pointing out that TSH neither causes, nor alleviates symptoms and that your baby needs adequate thyroid hormones.
You might have to think about a different doctor, though that would be tough, this late in a pregnancy.