When I am dead, I hope it is said;

*grin* Yeah, it seems to fit adrenal gland shutdown (or at least massive slowdown). Endocrinologist is looking at thyroid first it seems (which is fine - it mimics much of hypothyroidism due to lack of cortisol from the adrenals being available to convert T4 form thyroid hormone to T3 for use by the tissues, and hypothyroidism is much more common), but there are a number of other symptoms (like salt helping) that point at the adrenals.